1 /* $NetBSD: fdc_pnpbios.c,v 1.17 2012/02/02 19:42:59 tls 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 1.17 2012/02/02 19:42:59 tls Exp $"); 38 39 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 #include <sys/rnd.h> 48 49 #include <sys/bus.h> 50 #include <machine/intr.h> 51 52 #include <dev/isa/isavar.h> 53 #include <dev/isa/isadmavar.h> 54 55 #include <dev/isa/fdcvar.h> 56 57 #include <i386/pnpbios/pnpbiosvar.h> 58 59 int fdc_pnpbios_match(device_t, cfdata_t, void *); 60 void fdc_pnpbios_attach(device_t, device_t, void *); 61 62 struct fdc_pnpbios_softc { 63 struct fdc_softc sc_fdc; /* base fdc device */ 64 65 bus_space_handle_t sc_baseioh; /* base I/O handle */ 66 }; 67 68 69 CFATTACH_DECL_NEW(fdc_pnpbios, sizeof(struct fdc_pnpbios_softc), 70 fdc_pnpbios_match, fdc_pnpbios_attach, NULL, NULL); 71 72 int 73 fdc_pnpbios_match(device_t parent, cfdata_t match, void *aux) 74 { 75 struct pnpbiosdev_attach_args *aa = aux; 76 77 if (strcmp(aa->idstr, "PNP0700") == 0) 78 return (1); 79 80 return (0); 81 } 82 83 void 84 fdc_pnpbios_attach(device_t parent, device_t self, void *aux) 85 { 86 struct fdc_pnpbios_softc *pdc = device_private(self); 87 struct fdc_softc *fdc = &pdc->sc_fdc; 88 struct pnpbiosdev_attach_args *aa = aux; 89 int size, base; 90 91 aprint_normal("\n"); 92 93 fdc->sc_dev = self; 94 fdc->sc_ic = aa->ic; 95 96 if (pnpbios_io_map(aa->pbt, aa->resc, 0, &fdc->sc_iot, 97 &pdc->sc_baseioh)) { 98 aprint_error_dev(self, "unable to map I/O space\n"); 99 return; 100 } 101 102 /* 103 * Start accounting for "odd" pnpbios's. Some probe as 4 ports, 104 * some as 6 and some don't give the ctl port back. 105 */ 106 107 if (pnpbios_getiosize(aa->pbt, aa->resc, 0, &size)) { 108 aprint_error_dev(self, "can't get iobase size\n"); 109 return; 110 } 111 112 switch (size) { 113 114 /* Easy case. This matches right up with what the fdc code expects. */ 115 case 4: 116 fdc->sc_ioh = pdc->sc_baseioh; 117 break; 118 119 /* Map a subregion so this all lines up with the fdc code. */ 120 case 6: 121 if (bus_space_subregion(fdc->sc_iot, pdc->sc_baseioh, 2, 4, 122 &fdc->sc_ioh)) { 123 aprint_error_dev(self, 124 "unable to subregion I/O space\n"); 125 return; 126 } 127 break; 128 default: 129 aprint_error_dev(self, "unknown size: %d of io mapping\n", size); 130 return; 131 } 132 133 /* 134 * XXX: This is bad. If the pnpbios claims only 1 I/O range then it's 135 * omitting the controller I/O port. (One has to exist for there to 136 * be a working fdc). Just try and force the mapping in. 137 */ 138 139 if (aa->resc->numio == 1) { 140 141 if (pnpbios_getiobase(aa->pbt, aa->resc, 0, 0, &base)) { 142 aprint_error_dev(self, "can't get iobase\n"); 143 return; 144 } 145 if (bus_space_map(fdc->sc_iot, base + size + 1, 1, 0, 146 &fdc->sc_fdctlioh)) { 147 aprint_error_dev(self, 148 "unable to force map CTL I/O space\n"); 149 return; 150 } 151 } else if (pnpbios_io_map(aa->pbt, aa->resc, 1, &fdc->sc_iot, 152 &fdc->sc_fdctlioh)) { 153 aprint_error_dev(self, "unable to map CTL I/O space\n"); 154 return; 155 } 156 157 if (pnpbios_getdmachan(aa->pbt, aa->resc, 0, &fdc->sc_drq)) { 158 aprint_error_dev(self, "unable to get DMA channel\n"); 159 return; 160 } 161 162 pnpbios_print_devres(self, aa); 163 if (aa->resc->numio == 1) 164 aprint_error_dev(self, 165 "ctl io %x didn't probe. Forced attach\n", 166 base + size + 1); 167 168 fdc->sc_ih = pnpbios_intr_establish(aa->pbt, aa->resc, 0, IPL_BIO, 169 fdcintr, fdc); 170 171 fdcattach(fdc); 172 } 173