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/rman.h> 38 #include <sys/serial.h> 39 40 #include <dev/scc/scc_bfe.h> 41 #include <dev/scc/scc_bus.h> 42 43 #include <dev/ic/z8530.h> 44 45 #include "scc_if.h" 46 47 static int z8530_bfe_attach(struct scc_softc *, int); 48 static int z8530_bfe_iclear(struct scc_softc *, struct scc_chan *); 49 static int z8530_bfe_ipend(struct scc_softc *); 50 static int z8530_bfe_probe(struct scc_softc *); 51 52 static kobj_method_t z8530_methods[] = { 53 KOBJMETHOD(scc_attach, z8530_bfe_attach), 54 KOBJMETHOD(scc_iclear, z8530_bfe_iclear), 55 KOBJMETHOD(scc_ipend, z8530_bfe_ipend), 56 KOBJMETHOD(scc_probe, z8530_bfe_probe), 57 KOBJMETHOD_END 58 }; 59 60 struct scc_class scc_z8530_class = { 61 "z8530 class", 62 z8530_methods, 63 sizeof(struct scc_softc), 64 .cl_channels = 2, 65 .cl_class = SCC_CLASS_Z8530, 66 .cl_modes = SCC_MODE_ASYNC | SCC_MODE_BISYNC | SCC_MODE_HDLC, 67 .cl_range = CHAN_B - CHAN_A, 68 }; 69 70 /* Multiplexed I/O. */ 71 static __inline uint8_t 72 scc_getmreg(struct scc_bas *bas, int ch, int reg) 73 { 74 75 scc_setreg(bas, ch + REG_CTRL, reg); 76 scc_barrier(bas); 77 return (scc_getreg(bas, ch + REG_CTRL)); 78 } 79 80 static int 81 z8530_bfe_attach(struct scc_softc *sc __unused, int reset __unused) 82 { 83 84 return (0); 85 } 86 87 static int 88 z8530_bfe_iclear(struct scc_softc *sc, struct scc_chan *ch) 89 { 90 struct scc_bas *bas; 91 int c; 92 93 bas = &sc->sc_bas; 94 c = (ch->ch_nr == 1) ? CHAN_A : CHAN_B; 95 mtx_lock_spin(&sc->sc_hwmtx); 96 if (ch->ch_ipend & SER_INT_TXIDLE) { 97 scc_setreg(bas, c + REG_CTRL, CR_RSTTXI); 98 scc_barrier(bas); 99 } 100 if (ch->ch_ipend & SER_INT_RXREADY) { 101 scc_getreg(bas, c + REG_DATA); 102 scc_barrier(bas); 103 } 104 if (ch->ch_ipend & (SER_INT_OVERRUN|SER_INT_BREAK)) 105 scc_setreg(bas, c + REG_CTRL, CR_RSTERR); 106 mtx_unlock_spin(&sc->sc_hwmtx); 107 return (0); 108 } 109 110 #define SIGCHG(c, i, s, d) \ 111 if (c) { \ 112 i |= (i & s) ? s : s | d; \ 113 } else { \ 114 i = (i & s) ? (i & ~s) | d : i; \ 115 } 116 117 static int 118 z8530_bfe_ipend(struct scc_softc *sc) 119 { 120 struct scc_bas *bas; 121 struct scc_chan *ch[2]; 122 uint32_t sig; 123 uint8_t bes, ip, src; 124 125 bas = &sc->sc_bas; 126 ch[0] = &sc->sc_chan[0]; 127 ch[1] = &sc->sc_chan[1]; 128 ch[0]->ch_ipend = 0; 129 ch[1]->ch_ipend = 0; 130 131 mtx_lock_spin(&sc->sc_hwmtx); 132 ip = scc_getmreg(bas, CHAN_A, RR_IP); 133 if (ip & IP_RIA) 134 ch[0]->ch_ipend |= SER_INT_RXREADY; 135 if (ip & IP_RIB) 136 ch[1]->ch_ipend |= SER_INT_RXREADY; 137 if (ip & IP_TIA) 138 ch[0]->ch_ipend |= SER_INT_TXIDLE; 139 if (ip & IP_TIB) 140 ch[1]->ch_ipend |= SER_INT_TXIDLE; 141 if (ip & IP_SIA) { 142 bes = scc_getmreg(bas, CHAN_A, CR_RSTXSI); 143 if (bes & BES_BRK) 144 ch[0]->ch_ipend |= SER_INT_BREAK; 145 sig = ch[0]->ch_hwsig; 146 SIGCHG(bes & BES_CTS, sig, SER_CTS, SER_DCTS); 147 SIGCHG(bes & BES_DCD, sig, SER_DCD, SER_DDCD); 148 SIGCHG(bes & BES_SYNC, sig, SER_DSR, SER_DDSR); 149 if (sig & SER_MASK_DELTA) { 150 ch[0]->ch_hwsig = sig; 151 ch[0]->ch_ipend |= SER_INT_SIGCHG; 152 } 153 src = scc_getmreg(bas, CHAN_A, RR_SRC); 154 if (src & SRC_OVR) 155 ch[0]->ch_ipend |= SER_INT_OVERRUN; 156 } 157 if (ip & IP_SIB) { 158 bes = scc_getmreg(bas, CHAN_B, CR_RSTXSI); 159 if (bes & BES_BRK) 160 ch[1]->ch_ipend |= SER_INT_BREAK; 161 sig = ch[1]->ch_hwsig; 162 SIGCHG(bes & BES_CTS, sig, SER_CTS, SER_DCTS); 163 SIGCHG(bes & BES_DCD, sig, SER_DCD, SER_DDCD); 164 SIGCHG(bes & BES_SYNC, sig, SER_DSR, SER_DDSR); 165 if (sig & SER_MASK_DELTA) { 166 ch[1]->ch_hwsig = sig; 167 ch[1]->ch_ipend |= SER_INT_SIGCHG; 168 } 169 src = scc_getmreg(bas, CHAN_B, RR_SRC); 170 if (src & SRC_OVR) 171 ch[1]->ch_ipend |= SER_INT_OVERRUN; 172 } 173 mtx_unlock_spin(&sc->sc_hwmtx); 174 175 return (ch[0]->ch_ipend | ch[1]->ch_ipend); 176 } 177 178 static int 179 z8530_bfe_probe(struct scc_softc *sc __unused) 180 { 181 182 return (0); 183 } 184