1 /* $NetBSD: fdc_pnpbus.c,v 1.2 2008/04/29 06:53:02 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Tim Rightnour 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_pnpbus.c,v 1.2 2008/04/29 06:53:02 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 #include <machine/isa_machdep.h> 54 55 #include <dev/isa/isavar.h> 56 #include <dev/isa/isadmavar.h> 57 58 #include <dev/isa/fdcvar.h> 59 60 #include <prep/pnpbus/pnpbusvar.h> 61 62 static int fdc_pnpbus_match(device_t, cfdata_t, void *); 63 static void fdc_pnpbus_attach(device_t, device_t, void *); 64 65 struct fdc_pnpbus_softc { 66 struct fdc_softc sc_fdc; /* base fdc device */ 67 68 bus_space_handle_t sc_baseioh; /* base I/O handle */ 69 }; 70 71 CFATTACH_DECL2_NEW(fdc_pnpbus, sizeof(struct fdc_pnpbus_softc), 72 fdc_pnpbus_match, fdc_pnpbus_attach, NULL, NULL, NULL, NULL); 73 74 static int 75 fdc_pnpbus_match(device_t parent, cfdata_t match, void *aux) 76 { 77 struct pnpbus_dev_attach_args *pna = aux; 78 int ret = 0; 79 80 if (strcmp(pna->pna_devid, "PNP0700") == 0) 81 ret = 1; 82 83 if (ret) 84 pnpbus_scan(pna, pna->pna_ppc_dev); 85 86 return ret; 87 } 88 89 static void 90 fdc_pnpbus_attach(device_t parent, device_t self, void *aux) 91 { 92 struct fdc_pnpbus_softc *pdc = device_private(self); 93 struct fdc_softc *fdc = &pdc->sc_fdc; 94 struct pnpbus_dev_attach_args *pna = aux; 95 int size, base; 96 97 fdc->sc_dev = self; 98 fdc->sc_ic = pna->pna_ic; 99 100 if (pnpbus_io_map(&pna->pna_res, 0, &fdc->sc_iot, &pdc->sc_baseioh)) { 101 aprint_error_dev(self, "unable to map I/O space\n"); 102 return; 103 } 104 105 /* 106 * Start accounting for "odd" pnpbus's. Some probe as 4 ports, 107 * some as 6 and some don't give the ctl port back. 108 */ 109 110 if (pnpbus_getioport(&pna->pna_res, 0, &base, &size)) { 111 aprint_error_dev(self, "can't get iobase size\n"); 112 return; 113 } 114 115 switch (size) { 116 117 /* Easy case. This matches right up with what the fdc code expects. */ 118 case 4: 119 fdc->sc_ioh = pdc->sc_baseioh; 120 break; 121 122 /* Map a subregion so this all lines up with the fdc code. */ 123 case 6: 124 if (bus_space_subregion(fdc->sc_iot, pdc->sc_baseioh, 2, 4, 125 &fdc->sc_ioh)) { 126 aprint_error_dev(self, 127 "unable to subregion I/O space\n"); 128 return; 129 } 130 break; 131 default: 132 aprint_error_dev(self, "unknown size: %d of io mapping\n", size); 133 return; 134 } 135 136 /* 137 * XXX: This is bad. If the pnpbus claims only 1 I/O range then it's 138 * omitting the controller I/O port. (One has to exist for there to 139 * be a working fdc). Just try and force the mapping in. 140 */ 141 142 if (pna->pna_res.numio == 1) { 143 if (bus_space_map(fdc->sc_iot, base + size + 1, 1, 0, 144 &fdc->sc_fdctlioh)) { 145 aprint_error_dev(self, 146 "unable to force map CTL I/O space\n"); 147 return; 148 } 149 } else if (pnpbus_io_map(&pna->pna_res, 1, &fdc->sc_iot, 150 &fdc->sc_fdctlioh)) { 151 aprint_error_dev(self, "unable to map CTL I/O space\n"); 152 return; 153 } 154 155 if (pnpbus_getdmachan(&pna->pna_res, 0, &fdc->sc_drq)) { 156 aprint_error_dev(self, "unable to get DMA channel\n"); 157 return; 158 } 159 160 if (pna->pna_res.numio == 1) 161 aprint_normal_dev(self, 162 "ctl io %x didn't probe. Forced attach\n", base + size + 1); 163 164 aprint_normal("\n"); 165 166 /* The 7043-140 gets the type wrong, so overide to edge allways */ 167 fdc->sc_ih = pnpbus_intr_establish(0, IPL_BIO, IST_EDGE, fdcintr, fdc, 168 &pna->pna_res); 169 170 fdcattach(fdc); 171 } 172