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fdc_pnpbios.c revision 1.16.2.1 
      1 /*	$NetBSD: fdc_pnpbios.c,v 1.16.2.1 2012/04/17 00:06:30 yamt 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 1.16.2.1 2012/04/17 00:06:30 yamt 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