sys/arch/powerpc/ibm4xx/dev/com_opb.c

   1 /* $NetBSD: com_opb.c,v 1.19 2007/02/22 16:57:57 thorpej Exp $ */
   2
   3 /*
   4  * Copyright 2001 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project by
  20  *      Wasabi Systems, Inc.
  21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  22  *    or promote products derived from this software without specific prior
  23  *    written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 /*
  39  * Copyright (c) 1998
  40  *      Matthias Drochner.  All rights reserved.
  41  *
  42  * Redistribution and use in source and binary forms, with or without
  43  * modification, are permitted provided that the following conditions
  44  * are met:
  45  * 1. Redistributions of source code must retain the above copyright
  46  *    notice, this list of conditions and the following disclaimer.
  47  * 2. Redistributions in binary form must reproduce the above copyright
  48  *    notice, this list of conditions and the following disclaimer in the
  49  *    documentation and/or other materials provided with the distribution.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  52  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  53  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  54  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  55  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  56  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  60  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  */
  62
  63 #include <sys/cdefs.h>
  64 __KERNEL_RCSID(0, "$NetBSD: com_opb.c,v 1.19 2007/02/22 16:57:57 thorpej Exp $");
  65
  66 #include <sys/param.h>
  67 #include <sys/device.h>
  68 #include <sys/tty.h>
  69 #include <sys/systm.h>
  70
  71 #include <lib/libkern/libkern.h>
  72
  73 #include <machine/cpu.h>
  74
  75 #include <powerpc/ibm4xx/dev/opbvar.h>
  76 #include <powerpc/ibm4xx/dev/comopbvar.h>
  77
  78 #include "com.h"
  79 #if (NCOM > 0)
  80 #include <dev/ic/comreg.h>
  81 #include <dev/ic/comvar.h>
  82 #endif
  83
  84 struct com_opb_softc {
  85         struct com_softc sc_com;
  86         void *sc_ih;
  87 };
  88
  89 static int      com_opb_probe(device_t, cfdata_t , void *);
  90 static void     com_opb_attach(device_t, device_t, void *);
  91
  92 CFATTACH_DECL_NEW(com_opb, sizeof(struct com_opb_softc),
  93     com_opb_probe, com_opb_attach, NULL, NULL);
  94
  95 int
  96 com_opb_probe(device_t parent, cfdata_t cf, void *aux)
  97 {
  98         struct opb_attach_args *oaa = aux;
  99
 100         /* match only com devices */
 101         if (strcmp(oaa->opb_name, cf->cf_name) != 0)
 102                 return 0;
 103
 104         return (1);
 105 }
 106
 107 void
 108 com_opb_attach(device_t parent, device_t self, void *aux)
 109 {
 110         struct com_opb_softc *msc = device_private(self);
 111         struct com_softc *sc = &msc->sc_com;
 112         struct opb_attach_args *oaa = aux;
 113         prop_number_t freq;
 114         bus_space_handle_t ioh;
 115
 116         sc->sc_dev = self;
 117
 118         /* XXX console check */
 119
 120         bus_space_map(oaa->opb_bt, oaa->opb_addr, COM_NPORTS, 0, &ioh);
 121         COM_INIT_REGS(sc->sc_regs, oaa->opb_bt, ioh, oaa->opb_addr);
 122
 123         freq = prop_dictionary_get(device_properties(sc->sc_dev),
 124             "clock-frequency");
 125         if (freq == NULL) {
 126                 aprint_error(": unable to get clock-frequency property\n");
 127                 return;
 128         }
 129         KASSERT(prop_object_type(freq) == PROP_TYPE_NUMBER);
 130         sc->sc_frequency = (int) prop_number_integer_value(freq);
 131
 132         com_attach_subr(sc);
 133
 134         intr_establish(oaa->opb_irq, IST_LEVEL, IPL_SERIAL, comintr, sc);
 135 }
 136
 137 /*
 138  * com_opb_cnattach:
 139  * Initialize the system console.
 140  */
 141 void
 142 com_opb_cnattach(int com_freq, int conaddr, int conspeed, int conmode)
 143 {
 144         static int attached = 0;
 145 #if (NCOM > 0)
 146         struct com_regs regs;
 147 #endif
 148
 149         if (attached)
 150                 return;
 151         attached = 1;
 152
 153 #if (NCOM > 0)
 154         /* We *know* the com-console attaches to opb */
 155         regs.cr_iot = opb_get_bus_space_tag();
 156         regs.cr_iobase = conaddr;
 157         regs.cr_nports = COM_NPORTS;
 158         /* regs.ioh is initialized by comcnattach */
 159
 160         if (comcnattach1(&regs, conspeed, com_freq, COM_TYPE_NORMAL, conmode))
 161                 panic("can't init serial console @%x", conaddr);
 162         else
 163                 return;
 164 #endif
 165         panic("console device missing -- serial console not in kernel");
 166         /* Of course, this is moot if there is no console... */
 167 }
 168
 169 /*
 170  * com_opb_device_register:
 171  */
 172 void
 173 com_opb_device_register(device_t dev, int frequency)
 174 {
 175         /* Set the frequency of the on-chip UART. */
 176         prop_number_t pn = prop_number_create_integer(frequency);
 177         KASSERT(pn != NULL);
 178
 179         if (prop_dictionary_set(device_properties(dev),
 180                                 "clock-frequency", pn) == false) {
 181                 printf("WARNING: unable to set clock-frequency "
 182                         "property for %s\n", device_xname(dev));
 183         }
 184         prop_object_release(pn);
 185 }