Home | History | Annotate | Line # | Download | only in pnpbus
fdc_pnpbus.c revision 1.3.2.1 
      1 /*	$NetBSD: fdc_pnpbus.c,v 1.3.2.1 2012/04/17 00:06:49 yamt 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 1.3.2.1 2012/04/17 00:06:49 yamt 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