1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 /* Channel B is always at 0 offset. */ 55 #define CHAN_A (-(sc->sc_class->cl_range)) 56 #define CHAN_B 0 57 58 static kobj_method_t z8530_methods[] = { 59 KOBJMETHOD(scc_attach, z8530_bfe_attach), 60 KOBJMETHOD(scc_iclear, z8530_bfe_iclear), 61 KOBJMETHOD(scc_ipend, z8530_bfe_ipend), 62 KOBJMETHOD(scc_probe, z8530_bfe_probe), 63 KOBJMETHOD_END 64 }; 65 66 /* 67 * escc (macio) spacing. 68 */ 69 struct scc_class scc_z8530_escc_class = { 70 "z8530 escc class", 71 z8530_methods, 72 sizeof(struct scc_softc), 73 .cl_channels = 2, 74 .cl_class = SCC_CLASS_Z8530, 75 .cl_modes = SCC_MODE_ASYNC | SCC_MODE_BISYNC | SCC_MODE_HDLC, 76 /* Negative .cl_range signifies this is channel spacing. */ 77 .cl_range = (CHAN_B - 16), 78 }; 79 80 /* 81 * SUN compatible channel spacing. 82 */ 83 struct scc_class scc_z8530_legacy_class = { 84 "z8530 legacy class", 85 z8530_methods, 86 sizeof(struct scc_softc), 87 .cl_channels = 2, 88 .cl_class = SCC_CLASS_Z8530, 89 .cl_modes = SCC_MODE_ASYNC | SCC_MODE_BISYNC | SCC_MODE_HDLC, 90 /* Negative .cl_range signifies this is channel spacing. */ 91 .cl_range = (CHAN_B - 2), 92 }; 93 94 /* Multiplexed I/O. */ 95 static __inline uint8_t 96 scc_getmreg(struct scc_bas *bas, int ch, int reg) 97 { 98 99 scc_setreg(bas, ch + REG_CTRL, reg); 100 scc_barrier(bas); 101 return (scc_getreg(bas, ch + REG_CTRL)); 102 } 103 104 static int 105 z8530_bfe_attach(struct scc_softc *sc __unused, int reset __unused) 106 { 107 108 return (0); 109 } 110 111 static int 112 z8530_bfe_iclear(struct scc_softc *sc, struct scc_chan *ch) 113 { 114 struct scc_bas *bas; 115 int c; 116 117 bas = &sc->sc_bas; 118 c = (ch->ch_nr == 1) ? CHAN_A : CHAN_B; 119 mtx_lock_spin(&sc->sc_hwmtx); 120 if (ch->ch_ipend & SER_INT_TXIDLE) { 121 scc_setreg(bas, c + REG_CTRL, CR_RSTTXI); 122 scc_barrier(bas); 123 } 124 if (ch->ch_ipend & SER_INT_RXREADY) { 125 scc_getreg(bas, c + REG_DATA); 126 scc_barrier(bas); 127 } 128 if (ch->ch_ipend & (SER_INT_OVERRUN|SER_INT_BREAK)) 129 scc_setreg(bas, c + REG_CTRL, CR_RSTERR); 130 mtx_unlock_spin(&sc->sc_hwmtx); 131 return (0); 132 } 133 134 #define SIGCHG(c, i, s, d) \ 135 if (c) { \ 136 i |= (i & s) ? s : s | d; \ 137 } else { \ 138 i = (i & s) ? (i & ~s) | d : i; \ 139 } 140 141 static int 142 z8530_bfe_ipend(struct scc_softc *sc) 143 { 144 struct scc_bas *bas; 145 struct scc_chan *ch[2]; 146 uint32_t sig; 147 uint8_t bes, ip, src; 148 149 bas = &sc->sc_bas; 150 ch[0] = &sc->sc_chan[0]; 151 ch[1] = &sc->sc_chan[1]; 152 ch[0]->ch_ipend = 0; 153 ch[1]->ch_ipend = 0; 154 155 mtx_lock_spin(&sc->sc_hwmtx); 156 ip = scc_getmreg(bas, CHAN_A, RR_IP); 157 if (ip & IP_RIA) 158 ch[0]->ch_ipend |= SER_INT_RXREADY; 159 if (ip & IP_RIB) 160 ch[1]->ch_ipend |= SER_INT_RXREADY; 161 if (ip & IP_TIA) 162 ch[0]->ch_ipend |= SER_INT_TXIDLE; 163 if (ip & IP_TIB) 164 ch[1]->ch_ipend |= SER_INT_TXIDLE; 165 if (ip & IP_SIA) { 166 bes = scc_getmreg(bas, CHAN_A, CR_RSTXSI); 167 if (bes & BES_BRK) 168 ch[0]->ch_ipend |= SER_INT_BREAK; 169 sig = ch[0]->ch_hwsig; 170 SIGCHG(bes & BES_CTS, sig, SER_CTS, SER_DCTS); 171 SIGCHG(bes & BES_DCD, sig, SER_DCD, SER_DDCD); 172 SIGCHG(bes & BES_SYNC, sig, SER_DSR, SER_DDSR); 173 if (sig & SER_MASK_DELTA) { 174 ch[0]->ch_hwsig = sig; 175 ch[0]->ch_ipend |= SER_INT_SIGCHG; 176 } 177 src = scc_getmreg(bas, CHAN_A, RR_SRC); 178 if (src & SRC_OVR) 179 ch[0]->ch_ipend |= SER_INT_OVERRUN; 180 } 181 if (ip & IP_SIB) { 182 bes = scc_getmreg(bas, CHAN_B, CR_RSTXSI); 183 if (bes & BES_BRK) 184 ch[1]->ch_ipend |= SER_INT_BREAK; 185 sig = ch[1]->ch_hwsig; 186 SIGCHG(bes & BES_CTS, sig, SER_CTS, SER_DCTS); 187 SIGCHG(bes & BES_DCD, sig, SER_DCD, SER_DDCD); 188 SIGCHG(bes & BES_SYNC, sig, SER_DSR, SER_DDSR); 189 if (sig & SER_MASK_DELTA) { 190 ch[1]->ch_hwsig = sig; 191 ch[1]->ch_ipend |= SER_INT_SIGCHG; 192 } 193 src = scc_getmreg(bas, CHAN_B, RR_SRC); 194 if (src & SRC_OVR) 195 ch[1]->ch_ipend |= SER_INT_OVERRUN; 196 } 197 mtx_unlock_spin(&sc->sc_hwmtx); 198 199 return (ch[0]->ch_ipend | ch[1]->ch_ipend); 200 } 201 202 static int 203 z8530_bfe_probe(struct scc_softc *sc __unused) 204 { 205 206 return (0); 207 } 208