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      1 /*	$NetBSD: fdc_pnpbus.c,v 1.6 2021/07/24 21:31:34 andvar 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 1.6 2021/07/24 21:31:34 andvar 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 
     46 #include <sys/bus.h>
     47 #include <machine/intr.h>
     48 #include <machine/isa_machdep.h>
     49 
     50 #include <dev/isa/isavar.h>
     51 #include <dev/isa/isadmavar.h>
     52 
     53 #include <dev/isa/fdcvar.h>
     54 
     55 #include <prep/pnpbus/pnpbusvar.h>
     56 
     57 static int	fdc_pnpbus_match(device_t, cfdata_t, void *);
     58 static void	fdc_pnpbus_attach(device_t, device_t, void *);
     59 
     60 struct fdc_pnpbus_softc {
     61         struct fdc_softc sc_fdc;        /* base fdc device */
     62 
     63         bus_space_handle_t sc_baseioh;  /* base I/O handle */
     64 };
     65 
     66 CFATTACH_DECL2_NEW(fdc_pnpbus, sizeof(struct fdc_pnpbus_softc),
     67     fdc_pnpbus_match, fdc_pnpbus_attach, NULL, NULL, NULL, NULL);
     68 
     69 static int
     70 fdc_pnpbus_match(device_t parent, cfdata_t match, void *aux)
     71 {
     72 	struct pnpbus_dev_attach_args *pna = aux;
     73 	int ret = 0;
     74 
     75 	if (strcmp(pna->pna_devid, "PNP0700") == 0)
     76 		ret = 1;
     77 
     78 	if (ret)
     79 		pnpbus_scan(pna, pna->pna_ppc_dev);
     80 
     81 	return ret;
     82 }
     83 
     84 static void
     85 fdc_pnpbus_attach(device_t parent, device_t self, void *aux)
     86 {
     87         struct fdc_pnpbus_softc *pdc = device_private(self);
     88 	struct fdc_softc *fdc = &pdc->sc_fdc;
     89 	struct pnpbus_dev_attach_args *pna = aux;
     90         int size, base;
     91 
     92 	fdc->sc_dev = self;
     93 	fdc->sc_ic = pna->pna_ic;
     94 
     95 	if (pnpbus_io_map(&pna->pna_res, 0, &fdc->sc_iot, &pdc->sc_baseioh)) {
     96 		aprint_error_dev(self, "unable to map I/O space\n");
     97 		return;
     98 	}
     99 
    100 	/*
    101          * Start accounting for "odd" pnpbus's. Some probe as 4 ports,
    102          * some as 6 and some don't give the ctl port back.
    103          */
    104 
    105         if (pnpbus_getioport(&pna->pna_res, 0, &base, &size)) {
    106                 aprint_error_dev(self, "can't get iobase size\n");
    107                 return;
    108         }
    109 
    110         switch (size) {
    111 
    112         /* Easy case. This matches right up with what the fdc code expects. */
    113         case 4:
    114                 fdc->sc_ioh = pdc->sc_baseioh;
    115                 break;
    116 
    117         /* Map a subregion so this all lines up with the fdc code. */
    118         case 6:
    119                 if (bus_space_subregion(fdc->sc_iot, pdc->sc_baseioh, 2, 4,
    120                     &fdc->sc_ioh)) {
    121                         aprint_error_dev(self,
    122 			    "unable to subregion I/O space\n");
    123                         return;
    124                 }
    125                 break;
    126         default:
    127                 aprint_error_dev(self, "unknown size: %d of io mapping\n", size);
    128                 return;
    129         }
    130 
    131         /*
    132          * XXX: This is bad. If the pnpbus claims only 1 I/O range then it's
    133          * omitting the controller I/O port. (One has to exist for there to
    134          * be a working fdc). Just try and force the mapping in.
    135          */
    136 
    137         if (pna->pna_res.numio == 1) {
    138                 if (bus_space_map(fdc->sc_iot, base + size + 1, 1, 0,
    139                     &fdc->sc_fdctlioh)) {
    140                         aprint_error_dev(self,
    141 			    "unable to force map CTL I/O space\n");
    142                         return;
    143                 }
    144         } else if (pnpbus_io_map(&pna->pna_res, 1, &fdc->sc_iot,
    145 		   &fdc->sc_fdctlioh)) {
    146                 aprint_error_dev(self, "unable to map CTL I/O space\n");
    147 		return;
    148 	}
    149 
    150 	if (pnpbus_getdmachan(&pna->pna_res, 0, &fdc->sc_drq)) {
    151 		aprint_error_dev(self, "unable to get DMA channel\n");
    152 		return;
    153 	}
    154 
    155         if (pna->pna_res.numio == 1)
    156                 aprint_normal_dev(self,
    157 		    "ctl io %x didn't probe. Forced attach\n", base + size + 1);
    158 
    159 	aprint_normal("\n");
    160 
    161 	/* The 7043-140 gets the type wrong, so override to edge always */
    162 	fdc->sc_ih = pnpbus_intr_establish(0, IPL_BIO, IST_EDGE, fdcintr, fdc,
    163 	    &pna->pna_res);
    164 
    165 	fdcattach(fdc);
    166 }
    167