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/quicc.h> 46 47 #include "scc_if.h" 48 49 #define quicc_read2(bas, reg) \ 50 bus_space_read_2((bas)->bst, (bas)->bsh, reg) 51 #define quicc_read4(bas, reg) \ 52 bus_space_read_4((bas)->bst, (bas)->bsh, reg) 53 54 #define quicc_write2(bas, reg, val) \ 55 bus_space_write_2((bas)->bst, (bas)->bsh, reg, val) 56 #define quicc_write4(bas, reg, val) \ 57 bus_space_write_4((bas)->bst, (bas)->bsh, reg, val) 58 59 static int quicc_bfe_attach(struct scc_softc *, int); 60 static int quicc_bfe_enabled(struct scc_softc *, struct scc_chan *); 61 static int quicc_bfe_iclear(struct scc_softc *, struct scc_chan *); 62 static int quicc_bfe_ipend(struct scc_softc *); 63 static int quicc_bfe_probe(struct scc_softc *); 64 65 static kobj_method_t quicc_methods[] = { 66 KOBJMETHOD(scc_attach, quicc_bfe_attach), 67 KOBJMETHOD(scc_enabled, quicc_bfe_enabled), 68 KOBJMETHOD(scc_iclear, quicc_bfe_iclear), 69 KOBJMETHOD(scc_ipend, quicc_bfe_ipend), 70 KOBJMETHOD(scc_probe, quicc_bfe_probe), 71 KOBJMETHOD_END 72 }; 73 74 struct scc_class scc_quicc_class = { 75 "QUICC class", 76 quicc_methods, 77 sizeof(struct scc_softc), 78 .cl_channels = 4, 79 .cl_class = SCC_CLASS_QUICC, 80 .cl_modes = SCC_MODE_ASYNC | SCC_MODE_BISYNC | SCC_MODE_HDLC, 81 .cl_range = 0, 82 }; 83 84 static int 85 quicc_bfe_attach(struct scc_softc *sc __unused, int reset __unused) 86 { 87 88 return (0); 89 } 90 91 static int 92 quicc_bfe_enabled(struct scc_softc *sc, struct scc_chan *ch) 93 { 94 struct scc_bas *bas; 95 int unit; 96 uint16_t val0, val1; 97 98 bas = &sc->sc_bas; 99 unit = ch->ch_nr - 1; 100 val0 = quicc_read2(bas, QUICC_REG_SCC_TODR(unit)); 101 quicc_write2(bas, QUICC_REG_SCC_TODR(unit), ~val0); 102 val1 = quicc_read2(bas, QUICC_REG_SCC_TODR(unit)); 103 quicc_write2(bas, QUICC_REG_SCC_TODR(unit), val0); 104 return (((val0 | val1) == 0x8000) ? 1 : 0); 105 } 106 107 static int 108 quicc_bfe_iclear(struct scc_softc *sc, struct scc_chan *ch) 109 { 110 struct scc_bas *bas; 111 uint16_t rb, st; 112 113 bas = &sc->sc_bas; 114 mtx_lock_spin(&sc->sc_hwmtx); 115 if (ch->ch_ipend & SER_INT_RXREADY) { 116 rb = quicc_read2(bas, QUICC_PRAM_SCC_RBASE(ch->ch_nr - 1)); 117 st = quicc_read2(bas, rb); 118 (void)quicc_read4(bas, rb + 4); 119 quicc_write2(bas, rb, st | 0x9000); 120 } 121 mtx_unlock_spin(&sc->sc_hwmtx); 122 return (0); 123 } 124 125 static int 126 quicc_bfe_ipend(struct scc_softc *sc) 127 { 128 struct scc_bas *bas; 129 struct scc_chan *ch; 130 int c, ipend; 131 uint16_t scce; 132 133 bas = &sc->sc_bas; 134 ipend = 0; 135 for (c = 0; c < 4; c++) { 136 ch = &sc->sc_chan[c]; 137 if (!ch->ch_enabled) 138 continue; 139 ch->ch_ipend = 0; 140 mtx_lock_spin(&sc->sc_hwmtx); 141 scce = quicc_read2(bas, QUICC_REG_SCC_SCCE(c)); 142 quicc_write2(bas, QUICC_REG_SCC_SCCE(c), ~0); 143 mtx_unlock_spin(&sc->sc_hwmtx); 144 if (scce & 0x0001) 145 ch->ch_ipend |= SER_INT_RXREADY; 146 if (scce & 0x0002) 147 ch->ch_ipend |= SER_INT_TXIDLE; 148 if (scce & 0x0004) 149 ch->ch_ipend |= SER_INT_OVERRUN; 150 if (scce & 0x0020) 151 ch->ch_ipend |= SER_INT_BREAK; 152 /* XXX SIGNALS */ 153 ipend |= ch->ch_ipend; 154 } 155 return (ipend); 156 } 157 158 static int 159 quicc_bfe_probe(struct scc_softc *sc __unused) 160 { 161 162 return (0); 163 } 164