1 /* $NetBSD: fdc_pnpbus.c,v 1.4 2012/02/02 19:43:00 tls 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 1.4 2012/02/02 19:43:00 tls Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/callout.h> 42 #include <sys/device.h> 43 #include <sys/buf.h> 44 #include <sys/queue.h> 45 #include <sys/rnd.h> 46 47 #include <sys/bus.h> 48 #include <machine/intr.h> 49 #include <machine/isa_machdep.h> 50 51 #include <dev/isa/isavar.h> 52 #include <dev/isa/isadmavar.h> 53 54 #include <dev/isa/fdcvar.h> 55 56 #include <prep/pnpbus/pnpbusvar.h> 57 58 static int fdc_pnpbus_match(device_t, cfdata_t, void *); 59 static void fdc_pnpbus_attach(device_t, device_t, void *); 60 61 struct fdc_pnpbus_softc { 62 struct fdc_softc sc_fdc; /* base fdc device */ 63 64 bus_space_handle_t sc_baseioh; /* base I/O handle */ 65 }; 66 67 CFATTACH_DECL2_NEW(fdc_pnpbus, sizeof(struct fdc_pnpbus_softc), 68 fdc_pnpbus_match, fdc_pnpbus_attach, NULL, NULL, NULL, NULL); 69 70 static int 71 fdc_pnpbus_match(device_t parent, cfdata_t match, void *aux) 72 { 73 struct pnpbus_dev_attach_args *pna = aux; 74 int ret = 0; 75 76 if (strcmp(pna->pna_devid, "PNP0700") == 0) 77 ret = 1; 78 79 if (ret) 80 pnpbus_scan(pna, pna->pna_ppc_dev); 81 82 return ret; 83 } 84 85 static void 86 fdc_pnpbus_attach(device_t parent, device_t self, void *aux) 87 { 88 struct fdc_pnpbus_softc *pdc = device_private(self); 89 struct fdc_softc *fdc = &pdc->sc_fdc; 90 struct pnpbus_dev_attach_args *pna = aux; 91 int size, base; 92 93 fdc->sc_dev = self; 94 fdc->sc_ic = pna->pna_ic; 95 96 if (pnpbus_io_map(&pna->pna_res, 0, &fdc->sc_iot, &pdc->sc_baseioh)) { 97 aprint_error_dev(self, "unable to map I/O space\n"); 98 return; 99 } 100 101 /* 102 * Start accounting for "odd" pnpbus's. Some probe as 4 ports, 103 * some as 6 and some don't give the ctl port back. 104 */ 105 106 if (pnpbus_getioport(&pna->pna_res, 0, &base, &size)) { 107 aprint_error_dev(self, "can't get iobase size\n"); 108 return; 109 } 110 111 switch (size) { 112 113 /* Easy case. This matches right up with what the fdc code expects. */ 114 case 4: 115 fdc->sc_ioh = pdc->sc_baseioh; 116 break; 117 118 /* Map a subregion so this all lines up with the fdc code. */ 119 case 6: 120 if (bus_space_subregion(fdc->sc_iot, pdc->sc_baseioh, 2, 4, 121 &fdc->sc_ioh)) { 122 aprint_error_dev(self, 123 "unable to subregion I/O space\n"); 124 return; 125 } 126 break; 127 default: 128 aprint_error_dev(self, "unknown size: %d of io mapping\n", size); 129 return; 130 } 131 132 /* 133 * XXX: This is bad. If the pnpbus claims only 1 I/O range then it's 134 * omitting the controller I/O port. (One has to exist for there to 135 * be a working fdc). Just try and force the mapping in. 136 */ 137 138 if (pna->pna_res.numio == 1) { 139 if (bus_space_map(fdc->sc_iot, base + size + 1, 1, 0, 140 &fdc->sc_fdctlioh)) { 141 aprint_error_dev(self, 142 "unable to force map CTL I/O space\n"); 143 return; 144 } 145 } else if (pnpbus_io_map(&pna->pna_res, 1, &fdc->sc_iot, 146 &fdc->sc_fdctlioh)) { 147 aprint_error_dev(self, "unable to map CTL I/O space\n"); 148 return; 149 } 150 151 if (pnpbus_getdmachan(&pna->pna_res, 0, &fdc->sc_drq)) { 152 aprint_error_dev(self, "unable to get DMA channel\n"); 153 return; 154 } 155 156 if (pna->pna_res.numio == 1) 157 aprint_normal_dev(self, 158 "ctl io %x didn't probe. Forced attach\n", base + size + 1); 159 160 aprint_normal("\n"); 161 162 /* The 7043-140 gets the type wrong, so overide to edge allways */ 163 fdc->sc_ih = pnpbus_intr_establish(0, IPL_BIO, IST_EDGE, fdcintr, fdc, 164 &pna->pna_res); 165 166 fdcattach(fdc); 167 } 168