1 /* $NetBSD: fdc_pnpbios.c,v 1.14 2008/04/28 20:23:25 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 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 * PNPBIOS attachment for the PC Floppy Controller driver. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: fdc_pnpbios.c,v 1.14 2008/04/28 20:23:25 martin Exp $"); 38 39 #include "rnd.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/callout.h> 44 #include <sys/device.h> 45 #include <sys/buf.h> 46 #include <sys/queue.h> 47 #if NRND > 0 48 #include <sys/rnd.h> 49 #endif 50 51 #include <machine/bus.h> 52 #include <machine/intr.h> 53 54 #include <dev/isa/isavar.h> 55 #include <dev/isa/isadmavar.h> 56 57 #include <dev/isa/fdcvar.h> 58 59 #include <i386/pnpbios/pnpbiosvar.h> 60 61 int fdc_pnpbios_match(device_t, cfdata_t, void *); 62 void fdc_pnpbios_attach(device_t, device_t, void *); 63 64 struct fdc_pnpbios_softc { 65 struct fdc_softc sc_fdc; /* base fdc device */ 66 67 bus_space_handle_t sc_baseioh; /* base I/O handle */ 68 }; 69 70 71 CFATTACH_DECL_NEW(fdc_pnpbios, sizeof(struct fdc_pnpbios_softc), 72 fdc_pnpbios_match, fdc_pnpbios_attach, NULL, NULL); 73 74 int 75 fdc_pnpbios_match(device_t parent, cfdata_t match, void *aux) 76 { 77 struct pnpbiosdev_attach_args *aa = aux; 78 79 if (strcmp(aa->idstr, "PNP0700") == 0) 80 return (1); 81 82 return (0); 83 } 84 85 void 86 fdc_pnpbios_attach(device_t parent, device_t self, void *aux) 87 { 88 struct fdc_pnpbios_softc *pdc = device_private(self); 89 struct fdc_softc *fdc = &pdc->sc_fdc; 90 struct pnpbiosdev_attach_args *aa = aux; 91 int size, base; 92 93 aprint_normal("\n"); 94 95 fdc->sc_ic = aa->ic; 96 97 if (pnpbios_io_map(aa->pbt, aa->resc, 0, &fdc->sc_iot, 98 &pdc->sc_baseioh)) { 99 aprint_error_dev(self, "unable to map I/O space\n"); 100 return; 101 } 102 103 /* 104 * Start accounting for "odd" pnpbios's. Some probe as 4 ports, 105 * some as 6 and some don't give the ctl port back. 106 */ 107 108 if (pnpbios_getiosize(aa->pbt, aa->resc, 0, &size)) { 109 aprint_error_dev(self, "can't get iobase size\n"); 110 return; 111 } 112 113 switch (size) { 114 115 /* Easy case. This matches right up with what the fdc code expects. */ 116 case 4: 117 fdc->sc_ioh = pdc->sc_baseioh; 118 break; 119 120 /* Map a subregion so this all lines up with the fdc code. */ 121 case 6: 122 if (bus_space_subregion(fdc->sc_iot, pdc->sc_baseioh, 2, 4, 123 &fdc->sc_ioh)) { 124 aprint_error_dev(self, 125 "unable to subregion I/O space\n"); 126 return; 127 } 128 break; 129 default: 130 aprint_error_dev(self, "unknown size: %d of io mapping\n", size); 131 return; 132 } 133 134 /* 135 * XXX: This is bad. If the pnpbios claims only 1 I/O range then it's 136 * omitting the controller I/O port. (One has to exist for there to 137 * be a working fdc). Just try and force the mapping in. 138 */ 139 140 if (aa->resc->numio == 1) { 141 142 if (pnpbios_getiobase(aa->pbt, aa->resc, 0, 0, &base)) { 143 aprint_error_dev(self, "can't get iobase\n"); 144 return; 145 } 146 if (bus_space_map(fdc->sc_iot, base + size + 1, 1, 0, 147 &fdc->sc_fdctlioh)) { 148 aprint_error_dev(self, 149 "unable to force map CTL I/O space\n"); 150 return; 151 } 152 } else if (pnpbios_io_map(aa->pbt, aa->resc, 1, &fdc->sc_iot, 153 &fdc->sc_fdctlioh)) { 154 aprint_error_dev(self, "unable to map CTL I/O space\n"); 155 return; 156 } 157 158 if (pnpbios_getdmachan(aa->pbt, aa->resc, 0, &fdc->sc_drq)) { 159 aprint_error_dev(self, "unable to get DMA channel\n"); 160 return; 161 } 162 163 pnpbios_print_devres(self, aa); 164 if (aa->resc->numio == 1) 165 aprint_error_dev(self, 166 "ctl io %x didn't probe. Forced attach\n", 167 base + size + 1); 168 169 fdc->sc_ih = pnpbios_intr_establish(aa->pbt, aa->resc, 0, IPL_BIO, 170 fdcintr, fdc); 171 172 fdcattach(fdc); 173 } 174