1e1ef7811SRafal Jaworowski /*- 2*4d846d26SWarner Losh * SPDX-License-Identifier: BSD-2-Clause 3718cf2ccSPedro F. Giffuni * 4e1ef7811SRafal Jaworowski * Copyright (c) 2004-2006 Marcel Moolenaar 5e1ef7811SRafal Jaworowski * All rights reserved. 6e1ef7811SRafal Jaworowski * 7e1ef7811SRafal Jaworowski * Redistribution and use in source and binary forms, with or without 8e1ef7811SRafal Jaworowski * modification, are permitted provided that the following conditions 9e1ef7811SRafal Jaworowski * are met: 10e1ef7811SRafal Jaworowski * 11e1ef7811SRafal Jaworowski * 1. Redistributions of source code must retain the above copyright 12e1ef7811SRafal Jaworowski * notice, this list of conditions and the following disclaimer. 13e1ef7811SRafal Jaworowski * 2. Redistributions in binary form must reproduce the above copyright 14e1ef7811SRafal Jaworowski * notice, this list of conditions and the following disclaimer in the 15e1ef7811SRafal Jaworowski * documentation and/or other materials provided with the distribution. 16e1ef7811SRafal Jaworowski * 17e1ef7811SRafal Jaworowski * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18e1ef7811SRafal Jaworowski * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19e1ef7811SRafal Jaworowski * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20e1ef7811SRafal Jaworowski * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21e1ef7811SRafal Jaworowski * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22e1ef7811SRafal Jaworowski * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23e1ef7811SRafal Jaworowski * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24e1ef7811SRafal Jaworowski * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25e1ef7811SRafal Jaworowski * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26e1ef7811SRafal Jaworowski * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27e1ef7811SRafal Jaworowski */ 28e1ef7811SRafal Jaworowski 29e1ef7811SRafal Jaworowski #include <sys/cdefs.h> 30e1ef7811SRafal Jaworowski __FBSDID("$FreeBSD$"); 31e1ef7811SRafal Jaworowski 32e1ef7811SRafal Jaworowski #include <sys/param.h> 33e1ef7811SRafal Jaworowski #include <sys/systm.h> 34e1ef7811SRafal Jaworowski #include <sys/bus.h> 35e1ef7811SRafal Jaworowski #include <sys/conf.h> 36e1ef7811SRafal Jaworowski #include <machine/bus.h> 37e2e050c8SConrad Meyer #include <sys/lock.h> 38e2e050c8SConrad Meyer #include <sys/mutex.h> 39e1ef7811SRafal Jaworowski #include <sys/rman.h> 40e1ef7811SRafal Jaworowski #include <sys/serial.h> 41e1ef7811SRafal Jaworowski 42e1ef7811SRafal Jaworowski #include <dev/scc/scc_bfe.h> 43e1ef7811SRafal Jaworowski #include <dev/scc/scc_bus.h> 44e1ef7811SRafal Jaworowski 45e1ef7811SRafal Jaworowski #include <dev/ic/quicc.h> 46e1ef7811SRafal Jaworowski 47e1ef7811SRafal Jaworowski #include "scc_if.h" 48e1ef7811SRafal Jaworowski 49e1ef7811SRafal Jaworowski #define quicc_read2(bas, reg) \ 50e1ef7811SRafal Jaworowski bus_space_read_2((bas)->bst, (bas)->bsh, reg) 51eb84fc95SMarius Strobl #define quicc_read4(bas, reg) \ 52eb84fc95SMarius Strobl bus_space_read_4((bas)->bst, (bas)->bsh, reg) 53e1ef7811SRafal Jaworowski 54e1ef7811SRafal Jaworowski #define quicc_write2(bas, reg, val) \ 55e1ef7811SRafal Jaworowski bus_space_write_2((bas)->bst, (bas)->bsh, reg, val) 56eb84fc95SMarius Strobl #define quicc_write4(bas, reg, val) \ 57eb84fc95SMarius Strobl bus_space_write_4((bas)->bst, (bas)->bsh, reg, val) 58e1ef7811SRafal Jaworowski 59e1ef7811SRafal Jaworowski static int quicc_bfe_attach(struct scc_softc *, int); 60e1ef7811SRafal Jaworowski static int quicc_bfe_enabled(struct scc_softc *, struct scc_chan *); 61e1ef7811SRafal Jaworowski static int quicc_bfe_iclear(struct scc_softc *, struct scc_chan *); 62e1ef7811SRafal Jaworowski static int quicc_bfe_ipend(struct scc_softc *); 63e1ef7811SRafal Jaworowski static int quicc_bfe_probe(struct scc_softc *); 64e1ef7811SRafal Jaworowski 65e1ef7811SRafal Jaworowski static kobj_method_t quicc_methods[] = { 66e1ef7811SRafal Jaworowski KOBJMETHOD(scc_attach, quicc_bfe_attach), 67e1ef7811SRafal Jaworowski KOBJMETHOD(scc_enabled, quicc_bfe_enabled), 68e1ef7811SRafal Jaworowski KOBJMETHOD(scc_iclear, quicc_bfe_iclear), 69e1ef7811SRafal Jaworowski KOBJMETHOD(scc_ipend, quicc_bfe_ipend), 70e1ef7811SRafal Jaworowski KOBJMETHOD(scc_probe, quicc_bfe_probe), 71c4b1deafSMarius Strobl KOBJMETHOD_END 72e1ef7811SRafal Jaworowski }; 73e1ef7811SRafal Jaworowski 74e1ef7811SRafal Jaworowski struct scc_class scc_quicc_class = { 75e1ef7811SRafal Jaworowski "QUICC class", 76e1ef7811SRafal Jaworowski quicc_methods, 77e1ef7811SRafal Jaworowski sizeof(struct scc_softc), 78e1ef7811SRafal Jaworowski .cl_channels = 4, 79e1ef7811SRafal Jaworowski .cl_class = SCC_CLASS_QUICC, 80e1ef7811SRafal Jaworowski .cl_modes = SCC_MODE_ASYNC | SCC_MODE_BISYNC | SCC_MODE_HDLC, 81e1ef7811SRafal Jaworowski .cl_range = 0, 82e1ef7811SRafal Jaworowski }; 83e1ef7811SRafal Jaworowski 84e1ef7811SRafal Jaworowski static int 85c4b1deafSMarius Strobl quicc_bfe_attach(struct scc_softc *sc __unused, int reset __unused) 86e1ef7811SRafal Jaworowski { 87e1ef7811SRafal Jaworowski 88e1ef7811SRafal Jaworowski return (0); 89e1ef7811SRafal Jaworowski } 90e1ef7811SRafal Jaworowski 91e1ef7811SRafal Jaworowski static int 92e1ef7811SRafal Jaworowski quicc_bfe_enabled(struct scc_softc *sc, struct scc_chan *ch) 93e1ef7811SRafal Jaworowski { 94e1ef7811SRafal Jaworowski struct scc_bas *bas; 95e1ef7811SRafal Jaworowski int unit; 96e1ef7811SRafal Jaworowski uint16_t val0, val1; 97e1ef7811SRafal Jaworowski 98e1ef7811SRafal Jaworowski bas = &sc->sc_bas; 99e1ef7811SRafal Jaworowski unit = ch->ch_nr - 1; 100e1ef7811SRafal Jaworowski val0 = quicc_read2(bas, QUICC_REG_SCC_TODR(unit)); 101e1ef7811SRafal Jaworowski quicc_write2(bas, QUICC_REG_SCC_TODR(unit), ~val0); 102e1ef7811SRafal Jaworowski val1 = quicc_read2(bas, QUICC_REG_SCC_TODR(unit)); 103e1ef7811SRafal Jaworowski quicc_write2(bas, QUICC_REG_SCC_TODR(unit), val0); 104e1ef7811SRafal Jaworowski return (((val0 | val1) == 0x8000) ? 1 : 0); 105e1ef7811SRafal Jaworowski } 106e1ef7811SRafal Jaworowski 107e1ef7811SRafal Jaworowski static int 108e1ef7811SRafal Jaworowski quicc_bfe_iclear(struct scc_softc *sc, struct scc_chan *ch) 109e1ef7811SRafal Jaworowski { 110c4b1deafSMarius Strobl struct scc_bas *bas; 111c4b1deafSMarius Strobl uint16_t rb, st; 112e1ef7811SRafal Jaworowski 113c4b1deafSMarius Strobl bas = &sc->sc_bas; 114c4b1deafSMarius Strobl mtx_lock_spin(&sc->sc_hwmtx); 115c4b1deafSMarius Strobl if (ch->ch_ipend & SER_INT_RXREADY) { 116c4b1deafSMarius Strobl rb = quicc_read2(bas, QUICC_PRAM_SCC_RBASE(ch->ch_nr - 1)); 117c4b1deafSMarius Strobl st = quicc_read2(bas, rb); 118c4b1deafSMarius Strobl (void)quicc_read4(bas, rb + 4); 119c4b1deafSMarius Strobl quicc_write2(bas, rb, st | 0x9000); 120c4b1deafSMarius Strobl } 121c4b1deafSMarius Strobl mtx_unlock_spin(&sc->sc_hwmtx); 122e1ef7811SRafal Jaworowski return (0); 123e1ef7811SRafal Jaworowski } 124e1ef7811SRafal Jaworowski 125e1ef7811SRafal Jaworowski static int 126e1ef7811SRafal Jaworowski quicc_bfe_ipend(struct scc_softc *sc) 127e1ef7811SRafal Jaworowski { 128e1ef7811SRafal Jaworowski struct scc_bas *bas; 129e1ef7811SRafal Jaworowski struct scc_chan *ch; 130e1ef7811SRafal Jaworowski int c, ipend; 131e1ef7811SRafal Jaworowski uint16_t scce; 132e1ef7811SRafal Jaworowski 133e1ef7811SRafal Jaworowski bas = &sc->sc_bas; 134e1ef7811SRafal Jaworowski ipend = 0; 135e1ef7811SRafal Jaworowski for (c = 0; c < 4; c++) { 136e1ef7811SRafal Jaworowski ch = &sc->sc_chan[c]; 137e1ef7811SRafal Jaworowski if (!ch->ch_enabled) 138e1ef7811SRafal Jaworowski continue; 139e1ef7811SRafal Jaworowski ch->ch_ipend = 0; 140e1ef7811SRafal Jaworowski mtx_lock_spin(&sc->sc_hwmtx); 141e1ef7811SRafal Jaworowski scce = quicc_read2(bas, QUICC_REG_SCC_SCCE(c)); 142e1ef7811SRafal Jaworowski quicc_write2(bas, QUICC_REG_SCC_SCCE(c), ~0); 143e1ef7811SRafal Jaworowski mtx_unlock_spin(&sc->sc_hwmtx); 144e1ef7811SRafal Jaworowski if (scce & 0x0001) 145e1ef7811SRafal Jaworowski ch->ch_ipend |= SER_INT_RXREADY; 146e1ef7811SRafal Jaworowski if (scce & 0x0002) 147e1ef7811SRafal Jaworowski ch->ch_ipend |= SER_INT_TXIDLE; 148e1ef7811SRafal Jaworowski if (scce & 0x0004) 149e1ef7811SRafal Jaworowski ch->ch_ipend |= SER_INT_OVERRUN; 150e1ef7811SRafal Jaworowski if (scce & 0x0020) 151e1ef7811SRafal Jaworowski ch->ch_ipend |= SER_INT_BREAK; 152e1ef7811SRafal Jaworowski /* XXX SIGNALS */ 153e1ef7811SRafal Jaworowski ipend |= ch->ch_ipend; 154e1ef7811SRafal Jaworowski } 155e1ef7811SRafal Jaworowski return (ipend); 156e1ef7811SRafal Jaworowski } 157e1ef7811SRafal Jaworowski 158e1ef7811SRafal Jaworowski static int 159c4b1deafSMarius Strobl quicc_bfe_probe(struct scc_softc *sc __unused) 160e1ef7811SRafal Jaworowski { 161e1ef7811SRafal Jaworowski 162e1ef7811SRafal Jaworowski return (0); 163e1ef7811SRafal Jaworowski } 164