sys/arch/acorn32/mainbus/atppc_pioc.c

   1 /* $NetBSD: atppc_pioc.c,v 1.4 2008/04/16 09:39:01 cegger Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2001 Alcove - Nicolas Souchu
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  * FreeBSD: src/sys/isa/ppc.c,v 1.26.2.5 2001/10/02 05:21:45 nsouch Exp
  29  *
  30  */
  31
  32 #include "opt_atppc.h"
  33
  34 #include <sys/param.h>
  35 __KERNEL_RCSID(0, "$NetBSD: atppc_pioc.c,v 1.4 2008/04/16 09:39:01 cegger Exp $");
  36
  37 #include <sys/systm.h>
  38 #include <sys/kernel.h>
  39 #include <sys/malloc.h>
  40 #include <sys/device.h>
  41
  42 #include <machine/intr.h>
  43 #include <machine/bus.h>
  44
  45 #include <arch/acorn32/mainbus/piocvar.h>
  46
  47 #include <dev/ic/atppcreg.h>
  48 #include <dev/ic/atppcvar.h>
  49
  50 #include "locators.h"
  51
  52 /* Probe and attach functions for a atppc device on the PIOC. */
  53 static int atppc_pioc_probe(device_t, cfdata_t, void *);
  54 static void atppc_pioc_attach(device_t, device_t, void *);
  55
  56 CFATTACH_DECL_NEW(atppc_pioc, sizeof(struct atppc_softc), atppc_pioc_probe,
  57         atppc_pioc_attach, NULL, NULL);
  58
  59 #define IO_LPTSIZE 8
  60
  61 /*
  62  * Probe function: find parallel port controller on isa bus. Combined from
  63  * lpt_isa_probe() in lpt.c and atppc_detect_port() from FreeBSD's ppc.c.
  64  */
  65 static int
  66 atppc_pioc_probe(device_t parent, cfdata_t cf, void *aux)
  67 {
  68         bus_space_handle_t ioh;
  69         struct pioc_attach_args *pa = aux;
  70         bus_space_tag_t iot = pa->pa_iot;
  71         int addr = pa->pa_iobase + pa->pa_offset;
  72         int rval = 0;
  73
  74         if (pa->pa_name && strcmp(pa->pa_name, "lpt") != 0)
  75                 return 0;
  76
  77         if (pa->pa_offset == PIOCCF_OFFSET_DEFAULT) {
  78                 aprint_error_dev(parent, "(%s): io port unknown.\n", __func__);
  79         } else if (bus_space_map(iot, addr, IO_LPTSIZE, 0, &ioh) == 0) {
  80                 if (atppc_detect_port(iot, ioh) == 0)
  81                         rval = 1;
  82                 else
  83                         aprint_error_dev(parent,
  84                             "(%s): unable to write/read I/O port.\n",
  85                             __func__);
  86                 bus_space_unmap(iot, ioh, IO_LPTSIZE);
  87         } else {
  88                 aprint_error_dev(parent, "(%s): attempt to map bus space failed.\n",
  89                     __func__);
  90         }
  91
  92         return rval;
  93 }
  94
  95 /* Attach function: attach and configure parallel port controller on isa bus. */
  96 static void
  97 atppc_pioc_attach(device_t parent, device_t self, void *aux)
  98 {
  99         struct atppc_softc *sc = device_private(self);
 100         struct pioc_attach_args *pa = aux;
 101         bus_addr_t iobase;
 102
 103         sc->sc_dev = self;
 104         sc->sc_iot = pa->pa_iot;
 105         sc->sc_has = 0;
 106         iobase = pa->pa_iobase + pa->pa_offset;
 107
 108         if (bus_space_map(sc->sc_iot, iobase, IO_LPTSIZE, 0,
 109                 &sc->sc_ioh) != 0) {
 110                 aprint_error(": attempt to map bus space failed, device not "
 111                         "properly attached.\n");
 112                 sc->sc_dev_ok = ATPPC_NOATTACH;
 113                 return;
 114         }
 115         sc->sc_dev_ok = ATPPC_ATTACHED;
 116
 117         /* Assign interrupt handler */
 118         if (!(device_cfdata(self)->cf_flags & ATPPC_FLAG_DISABLE_INTR)) {
 119                 if (pa->pa_irq != MAINBUSCF_IRQ_DEFAULT) {
 120                         /* Establish interrupt handler. */
 121                         sc->sc_ieh = intr_claim(pa->pa_irq, IPL_TTY, "atppc",
 122                             atppcintr, sc);
 123                         sc->sc_has |= ATPPC_HAS_INTR;
 124                 } else
 125                         ATPPC_DPRINTF(("%s: IRQ not assigned or bad number of "
 126                                 "IRQs.\n", device_xname(self)));
 127         } else
 128                 ATPPC_VPRINTF(("%s: interrupts not configured due to flags.\n",
 129                         device_xname(self)));
 130
 131         /* Run soft configuration attach */
 132         atppc_sc_attach(sc);
 133 }