1 /* $NetBSD: osiop_pcctwo.c,v 1.11 2007/10/19 12:00:37 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Steve C. Woodford. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Front-end attachment code for the ncr53c710 SCSI controller 41 * on mvme68k/mvme88k boards. 42 */ 43 44 #include <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: osiop_pcctwo.c,v 1.11 2007/10/19 12:00:37 ad Exp $"); 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/kernel.h> 50 #include <sys/device.h> 51 52 #include <dev/scsipi/scsi_all.h> 53 #include <dev/scsipi/scsipi_all.h> 54 #include <dev/scsipi/scsiconf.h> 55 56 #include <sys/cpu.h> 57 #include <sys/bus.h> 58 #include <machine/autoconf.h> 59 60 #include <dev/ic/osiopreg.h> 61 #include <dev/ic/osiopvar.h> 62 63 #include <dev/mvme/pcctworeg.h> 64 #include <dev/mvme/pcctwovar.h> 65 66 67 int osiop_pcctwo_match(struct device *, struct cfdata *, void *); 68 void osiop_pcctwo_attach(struct device *, struct device *, void *); 69 70 struct osiop_pcctwo_softc { 71 struct osiop_softc sc_osiop; 72 struct evcnt sc_evcnt; 73 }; 74 75 CFATTACH_DECL(osiop_pcctwo, sizeof(struct osiop_pcctwo_softc), 76 osiop_pcctwo_match, osiop_pcctwo_attach, NULL, NULL); 77 78 static int osiop_pcctwo_intr(void *); 79 80 extern struct cfdriver osiop_cd; 81 82 /* ARGSUSED */ 83 int 84 osiop_pcctwo_match(parent, cf, args) 85 struct device *parent; 86 struct cfdata *cf; 87 void *args; 88 { 89 struct pcctwo_attach_args *pa; 90 bus_space_handle_t bsh; 91 int rv; 92 93 pa = args; 94 95 if (strcmp(pa->pa_name, osiop_cd.cd_name)) 96 return (0); 97 98 /* 99 * See if the SCSI controller is responding. 100 */ 101 if (bus_space_map(pa->pa_bust, pa->pa_offset, OSIOP_NREGS, 0, &bsh)) 102 return (0); 103 rv = bus_space_peek_1(pa->pa_bust, bsh, OSIOP_CTEST8, NULL); 104 bus_space_unmap(pa->pa_bust, bsh, OSIOP_NREGS); 105 if (rv) 106 return (0); 107 108 pa->pa_ipl = cf->pcctwocf_ipl; 109 110 return (1); 111 } 112 113 /* ARGSUSED */ 114 void 115 osiop_pcctwo_attach(parent, self, args) 116 struct device *parent; 117 struct device *self; 118 void *args; 119 { 120 struct pcctwo_attach_args *pa; 121 struct osiop_pcctwo_softc *sc; 122 int clk, ctest7; 123 124 pa = (struct pcctwo_attach_args *) args; 125 sc = device_private(self); 126 127 /* 128 * On the '17x the siop's clock is the same as the CPU clock. 129 * On the other boards, the siop runs at twice the CPU clock. 130 * Also, the 17x cannot do proper bus-snooping (the 68060 is 131 * lame in this repspect) so don't enable it on that board. 132 */ 133 #ifdef MVME68K 134 if (machineid == MVME_172 || machineid == MVME_177) { 135 clk = cpuspeed; 136 ctest7 = 0; 137 } else { 138 clk = cpuspeed * 2; 139 ctest7 = OSIOP_CTEST7_SC0; 140 } 141 #else 142 #error Set up siop clock speed for mvme187 143 #endif 144 145 sc->sc_osiop.sc_bst = pa->pa_bust; 146 sc->sc_osiop.sc_dmat = pa->pa_dmat; 147 (void) bus_space_map(sc->sc_osiop.sc_bst, pa->pa_offset, OSIOP_NREGS, 148 0, &sc->sc_osiop.sc_reg); 149 150 sc->sc_osiop.sc_clock_freq = clk; 151 sc->sc_osiop.sc_ctest7 = ctest7 | OSIOP_CTEST7_TT1; 152 sc->sc_osiop.sc_dcntl = OSIOP_DCNTL_EA; 153 sc->sc_osiop.sc_id = 7; /* XXX: Could use NVRAM setting */ 154 155 /* Attach main MI driver */ 156 osiop_attach(&sc->sc_osiop); 157 158 /* Register the event counter */ 159 evcnt_attach_dynamic(&sc->sc_evcnt, EVCNT_TYPE_INTR, 160 pcctwointr_evcnt(pa->pa_ipl), "disk", sc->sc_osiop.sc_dev.dv_xname); 161 162 /* Hook the chip's interrupt */ 163 pcctwointr_establish(PCCTWOV_SCSI, osiop_pcctwo_intr, pa->pa_ipl, sc, 164 &sc->sc_evcnt); 165 } 166 167 static int 168 osiop_pcctwo_intr(arg) 169 void *arg; 170 { 171 struct osiop_pcctwo_softc *sc = (struct osiop_pcctwo_softc *) arg; 172 u_char istat; 173 174 /* 175 * Catch any errors which can happen when the SIOP is 176 * local bus master... 177 */ 178 istat = pcc2_reg_read(sys_pcctwo, PCC2REG_SCSI_ERR_STATUS); 179 if ((istat & PCCTWO_ERR_SR_MASK) != 0) { 180 printf("%s: Local bus error: 0x%02x\n", 181 sc->sc_osiop.sc_dev.dv_xname, istat); 182 istat |= PCCTWO_ERR_SR_SCLR; 183 pcc2_reg_write(sys_pcctwo, PCC2REG_SCSI_ERR_STATUS, istat); 184 } 185 186 /* This is potentially nasty, since the IRQ is level triggered... */ 187 if (sc->sc_osiop.sc_flags & OSIOP_INTSOFF) 188 return (0); 189 190 istat = osiop_read_1(&sc->sc_osiop, OSIOP_ISTAT); 191 192 if ((istat & (OSIOP_ISTAT_SIP | OSIOP_ISTAT_DIP)) == 0) 193 return (0); 194 195 /* Save interrupt details for the back-end interrupt handler */ 196 sc->sc_osiop.sc_sstat0 = osiop_read_1(&sc->sc_osiop, OSIOP_SSTAT0); 197 sc->sc_osiop.sc_istat = istat; 198 sc->sc_osiop.sc_dstat = osiop_read_1(&sc->sc_osiop, OSIOP_DSTAT); 199 200 /* Deal with the interrupt */ 201 osiop_intr(&sc->sc_osiop); 202 203 return (1); 204 } 205