sys/arch/rs6000/ioplanar/com_iop.c

   1 /*      $NetBSD: com_iop.c,v 1.2 2008/03/14 15:09:10 cube Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2007 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 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: com_iop.c,v 1.2 2008/03/14 15:09:10 cube Exp $");
  34
  35 #include <sys/param.h>
  36 #include <sys/device.h>
  37 #include <sys/ioctl.h>
  38 #include <sys/tty.h>
  39
  40 #include <machine/intr.h>
  41 #include <machine/bus.h>
  42
  43 #include <dev/ic/comreg.h>
  44 #include <dev/ic/comvar.h>
  45
  46 #include <dev/mca/mcavar.h>
  47 #include <dev/mca/mcadevs.h>
  48
  49 #include <rs6000/ioplanar/ioplanarvar.h>
  50
  51 struct com_iop_softc {
  52         struct  com_softc sc_com;       /* real com softc */
  53         void *sc_ih;
  54 };
  55
  56 int com_iop_probe(device_t, cfdata_t , void *);
  57 void com_iop_attach(device_t, device_t, void *);
  58
  59 CFATTACH_DECL_NEW(com_iop, sizeof(struct com_iop_softc),
  60     com_iop_probe, com_iop_attach, NULL, NULL);
  61
  62 #define COM_RAINBOW_FREQ        8000000
  63
  64 /*
  65  * This probe is very unorthodox.  Basically, we have no way to actually
  66  * probe the device, so instead, we check that the specific device should
  67  * exist on the ioplanar, and just return true.
  68  */
  69
  70 int
  71 com_iop_probe(device_t parent, cfdata_t match, void *aux)
  72 {
  73         struct ioplanar_dev_attach_args *idaa = aux;
  74
  75         if (idaa->idaa_devid == MCA_PRODUCT_IBM_SIO_RAINBOW &&
  76             (idaa->idaa_device == IOP_COM0 || idaa->idaa_device == IOP_COM1))
  77                 return 1;
  78
  79         return 0;
  80 }
  81
  82 void
  83 com_iop_attach(device_t parent, device_t self, void *aux)
  84 {
  85         struct com_iop_softc *isc = device_private(self);
  86         struct com_softc *sc = &isc->sc_com;
  87         int iobase, irq;
  88         struct ioplanar_dev_attach_args *idaa = aux;
  89         bus_space_handle_t ioh;
  90
  91         sc->sc_dev = self;
  92
  93         switch (idaa->idaa_devid) {
  94         case MCA_PRODUCT_IBM_SIO_RAINBOW:
  95                 switch (idaa->idaa_device) {
  96                 case IOP_COM0:
  97                         iobase = 0x30;
  98                         irq = 2; /* ??? */
  99                         sc->sc_frequency = COM_RAINBOW_FREQ;
 100                         break;
 101                 case IOP_COM1:
 102                         iobase = 0x38;
 103                         irq = 2; /* ??? */
 104                         sc->sc_frequency = COM_RAINBOW_FREQ;
 105                         break;
 106                 default:
 107                         return;
 108                 }
 109                 break;
 110         default:
 111                 return;
 112         }
 113         if (!com_is_console(idaa->idaa_iot, iobase, &ioh) &&
 114             bus_space_map(idaa->idaa_iot, iobase, COM_NPORTS, 0, &ioh)) {
 115                 aprint_error(": can't map i/o space\n");
 116                 return;
 117         }
 118
 119         COM_INIT_REGS(sc->sc_regs, idaa->idaa_iot, ioh, iobase);
 120
 121         aprint_normal("i/o %#x-%#x irq %d", iobase, iobase + COM_NPORTS - 1,
 122             irq);
 123
 124         com_attach_subr(sc);
 125
 126         isc->sc_ih = mca_intr_establish(idaa->idaa_mc, irq, IPL_SERIAL,
 127             comintr, sc);
 128
 129         if (isc->sc_ih == NULL) {
 130                 aprint_error_dev(self,
 131                     "couldn't establish interrupt handler\n");
 132                 return;
 133         }
 134 }