1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2004-2006 Marcel Moolenaar 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/bus.h> 35 #include <sys/conf.h> 36 #include <machine/bus.h> 37 #include <sys/lock.h> 38 #include <sys/mutex.h> 39 #include <sys/rman.h> 40 #include <sys/serial.h> 41 42 #include <dev/scc/scc_bfe.h> 43 #include <dev/scc/scc_bus.h> 44 45 #include <dev/ic/z8530.h> 46 47 #include "scc_if.h" 48 49 static int z8530_bfe_attach(struct scc_softc *, int); 50 static int z8530_bfe_iclear(struct scc_softc *, struct scc_chan *); 51 static int z8530_bfe_ipend(struct scc_softc *); 52 static int z8530_bfe_probe(struct scc_softc *); 53 54 static kobj_method_t z8530_methods[] = { 55 KOBJMETHOD(scc_attach, z8530_bfe_attach), 56 KOBJMETHOD(scc_iclear, z8530_bfe_iclear), 57 KOBJMETHOD(scc_ipend, z8530_bfe_ipend), 58 KOBJMETHOD(scc_probe, z8530_bfe_probe), 59 KOBJMETHOD_END 60 }; 61 62 struct scc_class scc_z8530_class = { 63 "z8530 class", 64 z8530_methods, 65 sizeof(struct scc_softc), 66 .cl_channels = 2, 67 .cl_class = SCC_CLASS_Z8530, 68 .cl_modes = SCC_MODE_ASYNC | SCC_MODE_BISYNC | SCC_MODE_HDLC, 69 .cl_range = CHAN_B - CHAN_A, 70 }; 71 72 /* Multiplexed I/O. */ 73 static __inline uint8_t 74 scc_getmreg(struct scc_bas *bas, int ch, int reg) 75 { 76 77 scc_setreg(bas, ch + REG_CTRL, reg); 78 scc_barrier(bas); 79 return (scc_getreg(bas, ch + REG_CTRL)); 80 } 81 82 static int 83 z8530_bfe_attach(struct scc_softc *sc __unused, int reset __unused) 84 { 85 86 return (0); 87 } 88 89 static int 90 z8530_bfe_iclear(struct scc_softc *sc, struct scc_chan *ch) 91 { 92 struct scc_bas *bas; 93 int c; 94 95 bas = &sc->sc_bas; 96 c = (ch->ch_nr == 1) ? CHAN_A : CHAN_B; 97 mtx_lock_spin(&sc->sc_hwmtx); 98 if (ch->ch_ipend & SER_INT_TXIDLE) { 99 scc_setreg(bas, c + REG_CTRL, CR_RSTTXI); 100 scc_barrier(bas); 101 } 102 if (ch->ch_ipend & SER_INT_RXREADY) { 103 scc_getreg(bas, c + REG_DATA); 104 scc_barrier(bas); 105 } 106 if (ch->ch_ipend & (SER_INT_OVERRUN|SER_INT_BREAK)) 107 scc_setreg(bas, c + REG_CTRL, CR_RSTERR); 108 mtx_unlock_spin(&sc->sc_hwmtx); 109 return (0); 110 } 111 112 #define SIGCHG(c, i, s, d) \ 113 if (c) { \ 114 i |= (i & s) ? s : s | d; \ 115 } else { \ 116 i = (i & s) ? (i & ~s) | d : i; \ 117 } 118 119 static int 120 z8530_bfe_ipend(struct scc_softc *sc) 121 { 122 struct scc_bas *bas; 123 struct scc_chan *ch[2]; 124 uint32_t sig; 125 uint8_t bes, ip, src; 126 127 bas = &sc->sc_bas; 128 ch[0] = &sc->sc_chan[0]; 129 ch[1] = &sc->sc_chan[1]; 130 ch[0]->ch_ipend = 0; 131 ch[1]->ch_ipend = 0; 132 133 mtx_lock_spin(&sc->sc_hwmtx); 134 ip = scc_getmreg(bas, CHAN_A, RR_IP); 135 if (ip & IP_RIA) 136 ch[0]->ch_ipend |= SER_INT_RXREADY; 137 if (ip & IP_RIB) 138 ch[1]->ch_ipend |= SER_INT_RXREADY; 139 if (ip & IP_TIA) 140 ch[0]->ch_ipend |= SER_INT_TXIDLE; 141 if (ip & IP_TIB) 142 ch[1]->ch_ipend |= SER_INT_TXIDLE; 143 if (ip & IP_SIA) { 144 bes = scc_getmreg(bas, CHAN_A, CR_RSTXSI); 145 if (bes & BES_BRK) 146 ch[0]->ch_ipend |= SER_INT_BREAK; 147 sig = ch[0]->ch_hwsig; 148 SIGCHG(bes & BES_CTS, sig, SER_CTS, SER_DCTS); 149 SIGCHG(bes & BES_DCD, sig, SER_DCD, SER_DDCD); 150 SIGCHG(bes & BES_SYNC, sig, SER_DSR, SER_DDSR); 151 if (sig & SER_MASK_DELTA) { 152 ch[0]->ch_hwsig = sig; 153 ch[0]->ch_ipend |= SER_INT_SIGCHG; 154 } 155 src = scc_getmreg(bas, CHAN_A, RR_SRC); 156 if (src & SRC_OVR) 157 ch[0]->ch_ipend |= SER_INT_OVERRUN; 158 } 159 if (ip & IP_SIB) { 160 bes = scc_getmreg(bas, CHAN_B, CR_RSTXSI); 161 if (bes & BES_BRK) 162 ch[1]->ch_ipend |= SER_INT_BREAK; 163 sig = ch[1]->ch_hwsig; 164 SIGCHG(bes & BES_CTS, sig, SER_CTS, SER_DCTS); 165 SIGCHG(bes & BES_DCD, sig, SER_DCD, SER_DDCD); 166 SIGCHG(bes & BES_SYNC, sig, SER_DSR, SER_DDSR); 167 if (sig & SER_MASK_DELTA) { 168 ch[1]->ch_hwsig = sig; 169 ch[1]->ch_ipend |= SER_INT_SIGCHG; 170 } 171 src = scc_getmreg(bas, CHAN_B, RR_SRC); 172 if (src & SRC_OVR) 173 ch[1]->ch_ipend |= SER_INT_OVERRUN; 174 } 175 mtx_unlock_spin(&sc->sc_hwmtx); 176 177 return (ch[0]->ch_ipend | ch[1]->ch_ipend); 178 } 179 180 static int 181 z8530_bfe_probe(struct scc_softc *sc __unused) 182 { 183 184 return (0); 185 } 186