sys/arch/sparc/dev/com_ebus.c

   1 /*      $NetBSD: com_ebus.c,v 1.14 2008/03/14 15:09:10 cube Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Charles M. Hannum.
   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 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: com_ebus.c,v 1.14 2008/03/14 15:09:10 cube Exp $");
  34
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/device.h>
  38 #include <sys/termios.h>
  39
  40 #include <machine/bus.h>
  41 #include <machine/autoconf.h>
  42 #include <machine/intr.h>
  43
  44 #include <dev/ebus/ebusreg.h>
  45 #include <dev/ebus/ebusvar.h>
  46
  47 #include <dev/ic/comreg.h>
  48 #include <dev/ic/comvar.h>
  49
  50 struct com_ebus_softc {
  51         struct com_softc ebsc_com;      /* real "com" softc */
  52
  53         /* this space for rent */
  54 };
  55
  56 static int com_ebus_match(device_t, cfdata_t , void *);
  57 static void com_ebus_attach(device_t, device_t, void *);
  58
  59 CFATTACH_DECL_NEW(com_ebus, sizeof(struct com_ebus_softc),
  60     com_ebus_match, com_ebus_attach, NULL, NULL);
  61
  62 static int
  63 com_ebus_match(device_t parent, cfdata_t cf, void *aux)
  64 {
  65         struct ebus_attach_args *ea = aux;
  66         bus_space_handle_t ioh;
  67         int match;
  68
  69         if (strcmp(ea->ea_name, "su") != 0)
  70                 return (0);
  71
  72         match = 0;
  73         if (bus_space_map(ea->ea_bustag, EBUS_ADDR_FROM_REG(&ea->ea_reg[0]),
  74                           ea->ea_reg[0].size, 0, &ioh) == 0)
  75         {
  76                 match = comprobe1(ea->ea_bustag, ioh);
  77                 bus_space_unmap(ea->ea_bustag, ioh, ea->ea_reg[0].size);
  78         }
  79
  80         return (match);
  81 }
  82
  83 static void
  84 com_ebus_attach(device_t parent, device_t self, void *aux)
  85 {
  86         struct com_ebus_softc *ebsc = device_private(self);
  87         struct com_softc *sc = &ebsc->ebsc_com;
  88         struct ebus_attach_args *ea = aux;
  89         bus_space_tag_t iot;
  90         bus_space_handle_t ioh;
  91         bus_addr_t iobase;
  92
  93         sc->sc_dev = self;
  94         iot = ea->ea_bustag;
  95         iobase = EBUS_ADDR_FROM_REG(&ea->ea_reg[0]);
  96         sc->sc_frequency = COM_FREQ;
  97         sc->sc_hwflags = COM_HW_NO_TXPRELOAD;
  98
  99         /*
 100          * XXX: It would be nice to be able to split console input and
 101          * output to different devices.  For now switch to serial
 102          * console if PROM stdin is on serial (so that we can use DDB).
 103          */
 104         if (prom_instance_to_package(prom_stdin()) == ea->ea_node)
 105                 comcnattach(iot, iobase, B9600, sc->sc_frequency,
 106                     COM_TYPE_NORMAL, (CLOCAL | CREAD | CS8));
 107
 108         if (!com_is_console(iot, iobase, &ioh)
 109             && bus_space_map(iot, iobase, ea->ea_reg[0].size,
 110                              0, &ioh) != 0)
 111         {
 112                 aprint_error(": unable to map device registers\n");
 113                 return;
 114         }
 115
 116         COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase);
 117
 118         com_attach_subr(sc);
 119
 120         if (ea->ea_nintr != 0)
 121                 (void)bus_intr_establish(iot, ea->ea_intr[0], IPL_SERIAL,
 122                                          comintr, sc);
 123 }