1 /* $NetBSD: fdc_isa.c,v 1.21 2022/04/18 10:09:07 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /*- 33 * Copyright (c) 1990 The Regents of the University of California. 34 * All rights reserved. 35 * 36 * This code is derived from software contributed to Berkeley by 37 * Don Ahn. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 3. Neither the name of the University nor the names of its contributors 48 * may be used to endorse or promote products derived from this software 49 * without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 54 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 61 * SUCH DAMAGE. 62 * 63 * @(#)fd.c 7.4 (Berkeley) 5/25/91 64 */ 65 66 #include <sys/cdefs.h> 67 __KERNEL_RCSID(0, "$NetBSD: fdc_isa.c,v 1.21 2022/04/18 10:09:07 jmcneill Exp $"); 68 69 #include <sys/param.h> 70 #include <sys/systm.h> 71 #include <sys/callout.h> 72 #include <sys/device.h> 73 #include <sys/buf.h> 74 #include <sys/queue.h> 75 76 #include <sys/bus.h> 77 #include <sys/intr.h> 78 79 #include <dev/isa/isavar.h> 80 #include <dev/isa/isadmavar.h> 81 82 #include <dev/isa/fdreg.h> 83 #include <dev/isa/fdcvar.h> 84 85 static int fdc_isa_probe(device_t, cfdata_t, void *); 86 static void fdc_isa_attach(device_t, device_t, void *); 87 static int fdc_isa_detach(device_t, int); 88 89 struct fdc_isa_softc { 90 struct fdc_softc sc_fdc; /* base fdc device */ 91 92 bus_space_handle_t sc_baseioh; /* base I/O handle */ 93 }; 94 95 CFATTACH_DECL2_NEW(fdc_isa, sizeof(struct fdc_isa_softc), 96 fdc_isa_probe, fdc_isa_attach, fdc_isa_detach, NULL, NULL, fdc_childdet); 97 98 #ifdef NEWCONFIG 99 void fdc_isa_forceintr(void *); 100 #endif 101 102 static int 103 fdc_isa_probe(device_t parent, cfdata_t match, void *aux) 104 { 105 struct isa_attach_args *ia = aux; 106 bus_space_tag_t iot; 107 bus_space_handle_t ioh, ctl_ioh, base_ioh; 108 int rv, iobase; 109 110 iot = ia->ia_iot; 111 rv = 0; 112 113 if (ia->ia_nio < 1) 114 return (0); 115 if (ia->ia_nirq < 1) 116 return (0); 117 if (ia->ia_ndrq < 1) 118 return (0); 119 120 if (ISA_DIRECT_CONFIG(ia)) 121 return (0); 122 123 /* Disallow wildcarded I/O addresses. */ 124 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 125 return (0); 126 127 /* Don't allow wildcarded IRQ/DRQ. */ 128 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 129 return (0); 130 131 if (ia->ia_drq[0].ir_drq == ISA_UNKNOWN_DRQ) 132 return (0); 133 134 /* ISA chipset tag is required for DMA support. */ 135 if (ia->ia_ic == NULL) 136 return (0); 137 138 /* Map the I/O space. */ 139 iobase = ia->ia_io[0].ir_addr; 140 if (bus_space_map(iot, iobase, 6 /* FDC_NPORT */, 0, &base_ioh)) 141 return (0); 142 143 if (bus_space_subregion(iot, base_ioh, 2, 4, &ioh)) { 144 bus_space_unmap(iot, base_ioh, 6); 145 return (0); 146 } 147 148 if (bus_space_map(iot, iobase + fdctl + 2, 1, 0, &ctl_ioh)) { 149 bus_space_unmap(iot, base_ioh, 6); 150 return (0); 151 } 152 153 /* Not needed for the rest of the probe. */ 154 bus_space_unmap(iot, ctl_ioh, 1); 155 156 /* reset */ 157 bus_space_write_1(iot, ioh, fdout, 0); 158 delay(100); 159 bus_space_write_1(iot, ioh, fdout, FDO_FRST); 160 161 /* see if it can handle a command */ 162 if (out_fdc(iot, ioh, NE7CMD_SPECIFY) < 0) 163 goto out; 164 out_fdc(iot, ioh, 0xdf); 165 out_fdc(iot, ioh, 2); 166 167 rv = 1; 168 ia->ia_nio = 1; 169 ia->ia_io[0].ir_size = FDC_NPORT; 170 171 ia->ia_nirq = 1; 172 ia->ia_ndrq = 1; 173 174 ia->ia_niomem = 0; 175 176 out: 177 bus_space_unmap(iot, base_ioh, 6 /* FDC_NPORT */); 178 return (rv); 179 } 180 181 static int 182 fdc_isa_detach(device_t self, int flags) 183 { 184 int rc; 185 struct fdc_isa_softc *isc = device_private(self); 186 struct fdc_softc *fdc = &isc->sc_fdc; 187 188 if ((rc = fdcdetach(self, flags)) != 0) 189 return rc; 190 191 isa_intr_disestablish(fdc->sc_ic, fdc->sc_ih); 192 193 bus_space_unmap(fdc->sc_iot, fdc->sc_fdctlioh, 1); 194 195 bus_space_unmap(fdc->sc_iot, isc->sc_baseioh, 6 /* FDC_NPORT */); 196 197 return 0; 198 } 199 200 static void 201 fdc_isa_attach(device_t parent, device_t self, void *aux) 202 { 203 struct fdc_isa_softc *isc = device_private(self); 204 struct fdc_softc *fdc = &isc->sc_fdc; 205 struct isa_attach_args *ia = aux; 206 207 aprint_naive("\n"); 208 aprint_normal("\n"); 209 210 fdc->sc_dev = self; 211 fdc->sc_iot = ia->ia_iot; 212 fdc->sc_ic = ia->ia_ic; 213 fdc->sc_drq = ia->ia_drq[0].ir_drq; 214 215 if (bus_space_map(fdc->sc_iot, ia->ia_io[0].ir_addr, 216 6 /* FDC_NPORT */, 0, &isc->sc_baseioh)) { 217 aprint_normal_dev(fdc->sc_dev, "unable to map I/O space\n"); 218 return; 219 } 220 221 if (bus_space_subregion(fdc->sc_iot, isc->sc_baseioh, 2, 4, 222 &fdc->sc_ioh)) { 223 aprint_normal_dev(fdc->sc_dev, 224 "unable to subregion I/O space\n"); 225 return; 226 } 227 228 if (bus_space_map(fdc->sc_iot, ia->ia_io[0].ir_addr + fdctl + 2, 1, 0, 229 &fdc->sc_fdctlioh)) { 230 aprint_normal_dev(fdc->sc_dev, 231 "unable to map CTL I/O space\n"); 232 return; 233 } 234 235 fdc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 236 IST_EDGE, IPL_BIO, fdcintr, fdc); 237 238 fdcattach(fdc); 239 } 240
Indexes created Sat Sep 20 22:09:52 GMT 2025