6174e6ed12
controllers typically have multiple channels and support a number of serial communications protocols. The scc(4) driver is itself an umbrella driver that delegates the control over each channel and mode to a subordinate driver (like uart(4)). The scc(4) driver supports the Siemens SAB 82532 and the Zilog Z8530 and replaces puc(4) for these devices.
138 lines
3.7 KiB
C
138 lines
3.7 KiB
C
/*-
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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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__FBSDID("$FreeBSD$");
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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/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/sab82532.h>
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#include "scc_if.h"
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#define DEFAULT_RCLK 29491200
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static int sab82532_bfe_attach(struct scc_softc *, int);
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static int sab82532_bfe_iclear(struct scc_softc *, struct scc_chan *);
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static int sab82532_bfe_ipend(struct scc_softc *);
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static int sab82532_bfe_probe(struct scc_softc *);
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static kobj_method_t sab82532_methods[] = {
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KOBJMETHOD(scc_attach, sab82532_bfe_attach),
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KOBJMETHOD(scc_iclear, sab82532_bfe_iclear),
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KOBJMETHOD(scc_ipend, sab82532_bfe_ipend),
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KOBJMETHOD(scc_probe, sab82532_bfe_probe),
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{ 0, 0 }
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};
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struct scc_class scc_sab82532_class = {
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"sab82532 class",
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sab82532_methods,
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sizeof(struct scc_softc),
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.cl_channels = SAB_NCHAN,
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.cl_class = SCC_CLASS_SAB82532,
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.cl_modes = SCC_MODE_ASYNC | SCC_MODE_BISYNC | SCC_MODE_HDLC,
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.cl_range = SAB_CHANLEN,
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.cl_rclk = DEFAULT_RCLK,
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.cl_regshft = 0
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};
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static int
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sab82532_bfe_attach(struct scc_softc *sc, int reset)
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{
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struct scc_bas *bas;
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bas = &sc->sc_bas;
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return (0);
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}
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static int
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sab82532_bfe_iclear(struct scc_softc *sc, struct scc_chan *ch)
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{
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return (0);
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}
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static int
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sab82532_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;
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int ipend;
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int c, ofs;
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uint8_t isr0, isr1;
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bas = &sc->sc_bas;
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ipend = 0;
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for (c = 0; c < SAB_NCHAN; c++) {
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ch = &sc->sc_chan[c];
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ofs = c * SAB_CHANLEN;
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mtx_lock_spin(&sc->sc_hwmtx);
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isr0 = scc_getreg(bas, ofs + SAB_ISR0);
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isr1 = scc_getreg(bas, ofs + SAB_ISR1);
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scc_barrier(bas);
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if (isr0 & SAB_ISR0_TIME) {
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while (scc_getreg(bas, ofs + SAB_STAR) & SAB_STAR_CEC)
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;
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scc_setreg(bas, ofs + SAB_CMDR, SAB_CMDR_RFRD);
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scc_barrier(bas);
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}
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mtx_unlock_spin(&sc->sc_hwmtx);
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ch->ch_ipend = 0;
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if (isr1 & SAB_ISR1_BRKT)
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ch->ch_ipend |= SER_INT_BREAK;
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if (isr0 & SAB_ISR0_RFO)
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ch->ch_ipend |= SER_INT_OVERRUN;
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if (isr0 & (SAB_ISR0_TCD|SAB_ISR0_RPF))
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ch->ch_ipend |= SER_INT_RXREADY;
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if ((isr0 & SAB_ISR0_CDSC) || (isr1 & SAB_ISR1_CSC))
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ch->ch_ipend |= SER_INT_SIGCHG;
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if (isr1 & SAB_ISR1_ALLS)
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ch->ch_ipend |= SER_INT_TXIDLE;
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ipend |= ch->ch_ipend;
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}
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return (ipend);
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}
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static int
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sab82532_bfe_probe(struct scc_softc *sc)
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{
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struct scc_bas *bas;
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bas = &sc->sc_bas;
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return (0);
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}
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