206 lines
5.5 KiB
C
206 lines
5.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2004-2006 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <machine/bus.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/rman.h>
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#include <sys/serial.h>
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#include <dev/scc/scc_bfe.h>
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#include <dev/scc/scc_bus.h>
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#include <dev/ic/z8530.h>
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#include "scc_if.h"
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static int z8530_bfe_attach(struct scc_softc *, int);
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static int z8530_bfe_iclear(struct scc_softc *, struct scc_chan *);
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static int z8530_bfe_ipend(struct scc_softc *);
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static int z8530_bfe_probe(struct scc_softc *);
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/* Channel B is always at 0 offset. */
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#define CHAN_A (-(sc->sc_class->cl_range))
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#define CHAN_B 0
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static kobj_method_t z8530_methods[] = {
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KOBJMETHOD(scc_attach, z8530_bfe_attach),
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KOBJMETHOD(scc_iclear, z8530_bfe_iclear),
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KOBJMETHOD(scc_ipend, z8530_bfe_ipend),
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KOBJMETHOD(scc_probe, z8530_bfe_probe),
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KOBJMETHOD_END
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};
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/*
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* escc (macio) spacing.
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*/
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struct scc_class scc_z8530_escc_class = {
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"z8530 escc class",
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z8530_methods,
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sizeof(struct scc_softc),
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.cl_channels = 2,
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.cl_class = SCC_CLASS_Z8530,
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.cl_modes = SCC_MODE_ASYNC | SCC_MODE_BISYNC | SCC_MODE_HDLC,
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/* Negative .cl_range signifies this is channel spacing. */
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.cl_range = (CHAN_B - 16),
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};
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/*
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* SUN compatible channel spacing.
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*/
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struct scc_class scc_z8530_legacy_class = {
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"z8530 legacy class",
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z8530_methods,
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sizeof(struct scc_softc),
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.cl_channels = 2,
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.cl_class = SCC_CLASS_Z8530,
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.cl_modes = SCC_MODE_ASYNC | SCC_MODE_BISYNC | SCC_MODE_HDLC,
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/* Negative .cl_range signifies this is channel spacing. */
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.cl_range = (CHAN_B - 2),
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};
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/* Multiplexed I/O. */
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static __inline uint8_t
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scc_getmreg(struct scc_bas *bas, int ch, int reg)
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{
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scc_setreg(bas, ch + REG_CTRL, reg);
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scc_barrier(bas);
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return (scc_getreg(bas, ch + REG_CTRL));
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}
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static int
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z8530_bfe_attach(struct scc_softc *sc __unused, int reset __unused)
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{
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return (0);
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}
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static int
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z8530_bfe_iclear(struct scc_softc *sc, struct scc_chan *ch)
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{
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struct scc_bas *bas;
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int c;
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bas = &sc->sc_bas;
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c = (ch->ch_nr == 1) ? CHAN_A : CHAN_B;
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mtx_lock_spin(&sc->sc_hwmtx);
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if (ch->ch_ipend & SER_INT_TXIDLE) {
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scc_setreg(bas, c + REG_CTRL, CR_RSTTXI);
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scc_barrier(bas);
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}
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if (ch->ch_ipend & SER_INT_RXREADY) {
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scc_getreg(bas, c + REG_DATA);
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scc_barrier(bas);
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}
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if (ch->ch_ipend & (SER_INT_OVERRUN|SER_INT_BREAK))
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scc_setreg(bas, c + REG_CTRL, CR_RSTERR);
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mtx_unlock_spin(&sc->sc_hwmtx);
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return (0);
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}
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#define SIGCHG(c, i, s, d) \
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if (c) { \
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i |= (i & s) ? s : s | d; \
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} else { \
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i = (i & s) ? (i & ~s) | d : i; \
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}
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static int
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z8530_bfe_ipend(struct scc_softc *sc)
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{
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struct scc_bas *bas;
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struct scc_chan *ch[2];
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uint32_t sig;
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uint8_t bes, ip, src;
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bas = &sc->sc_bas;
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ch[0] = &sc->sc_chan[0];
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ch[1] = &sc->sc_chan[1];
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ch[0]->ch_ipend = 0;
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ch[1]->ch_ipend = 0;
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mtx_lock_spin(&sc->sc_hwmtx);
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ip = scc_getmreg(bas, CHAN_A, RR_IP);
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if (ip & IP_RIA)
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ch[0]->ch_ipend |= SER_INT_RXREADY;
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if (ip & IP_RIB)
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ch[1]->ch_ipend |= SER_INT_RXREADY;
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if (ip & IP_TIA)
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ch[0]->ch_ipend |= SER_INT_TXIDLE;
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if (ip & IP_TIB)
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ch[1]->ch_ipend |= SER_INT_TXIDLE;
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if (ip & IP_SIA) {
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bes = scc_getmreg(bas, CHAN_A, CR_RSTXSI);
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if (bes & BES_BRK)
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ch[0]->ch_ipend |= SER_INT_BREAK;
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sig = ch[0]->ch_hwsig;
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SIGCHG(bes & BES_CTS, sig, SER_CTS, SER_DCTS);
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SIGCHG(bes & BES_DCD, sig, SER_DCD, SER_DDCD);
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SIGCHG(bes & BES_SYNC, sig, SER_DSR, SER_DDSR);
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if (sig & SER_MASK_DELTA) {
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ch[0]->ch_hwsig = sig;
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ch[0]->ch_ipend |= SER_INT_SIGCHG;
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}
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src = scc_getmreg(bas, CHAN_A, RR_SRC);
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if (src & SRC_OVR)
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ch[0]->ch_ipend |= SER_INT_OVERRUN;
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}
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if (ip & IP_SIB) {
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bes = scc_getmreg(bas, CHAN_B, CR_RSTXSI);
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if (bes & BES_BRK)
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ch[1]->ch_ipend |= SER_INT_BREAK;
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sig = ch[1]->ch_hwsig;
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SIGCHG(bes & BES_CTS, sig, SER_CTS, SER_DCTS);
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SIGCHG(bes & BES_DCD, sig, SER_DCD, SER_DDCD);
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SIGCHG(bes & BES_SYNC, sig, SER_DSR, SER_DDSR);
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if (sig & SER_MASK_DELTA) {
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ch[1]->ch_hwsig = sig;
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ch[1]->ch_ipend |= SER_INT_SIGCHG;
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}
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src = scc_getmreg(bas, CHAN_B, RR_SRC);
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if (src & SRC_OVR)
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ch[1]->ch_ipend |= SER_INT_OVERRUN;
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}
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mtx_unlock_spin(&sc->sc_hwmtx);
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return (ch[0]->ch_ipend | ch[1]->ch_ipend);
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}
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static int
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z8530_bfe_probe(struct scc_softc *sc __unused)
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{
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return (0);
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}
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