sys/arch/sandpoint/isa/isaclock.c

   1 /*      $NetBSD: isaclock.c,v 1.12 2009/03/14 15:36:12 dsl Exp $        */
   2
   3 /*-
   4  * Copyright (c) 1990 The Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * William Jolitz and Don Ahn.
   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  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)clock.c     7.2 (Berkeley) 5/12/91
  35  */
  36 /*-
  37  * Copyright (c) 1993, 1994 Charles M. Hannum.
  38  *
  39  * This code is derived from software contributed to Berkeley by
  40  * William Jolitz and Don Ahn.
  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  * 3. All advertising materials mentioning features or use of this software
  51  *    must display the following acknowledgement:
  52  *      This product includes software developed by the University of
  53  *      California, Berkeley and its contributors.
  54  * 4. Neither the name of the University nor the names of its contributors
  55  *    may be used to endorse or promote products derived from this software
  56  *    without specific prior written permission.
  57  *
  58  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  59  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  60  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  61  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  62  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  63  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  64  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  65  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  66  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  67  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  68  * SUCH DAMAGE.
  69  *
  70  *      @(#)clock.c     7.2 (Berkeley) 5/12/91
  71  */
  72 /*
  73  * Mach Operating System
  74  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
  75  * All Rights Reserved.
  76  *
  77  * Permission to use, copy, modify and distribute this software and its
  78  * documentation is hereby granted, provided that both the copyright
  79  * notice and this permission notice appear in all copies of the
  80  * software, derivative works or modified versions, and any portions
  81  * thereof, and that both notices appear in supporting documentation.
  82  *
  83  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  84  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  85  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  86  *
  87  * Carnegie Mellon requests users of this software to return to
  88  *
  89  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  90  *  School of Computer Science
  91  *  Carnegie Mellon University
  92  *  Pittsburgh PA 15213-3890
  93  *
  94  * any improvements or extensions that they make and grant Carnegie Mellon
  95  * the rights to redistribute these changes.
  96  */
  97 /*
  98   Copyright 1988, 1989 by Intel Corporation, Santa Clara, California.
  99
 100                 All Rights Reserved
 101
 102 Permission to use, copy, modify, and distribute this software and
 103 its documentation for any purpose and without fee is hereby
 104 granted, provided that the above copyright notice appears in all
 105 copies and that both the copyright notice and this permission notice
 106 appear in supporting documentation, and that the name of Intel
 107 not be used in advertising or publicity pertaining to distribution
 108 of the software without specific, written prior permission.
 109
 110 INTEL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
 111 INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
 112 IN NO EVENT SHALL INTEL BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
 113 CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 114 LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
 115 NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 116 WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 117 */
 118
 119 /*
 120  * Primitive clock interrupt routines.
 121  */
 122
 123 #include <sys/cdefs.h>
 124 __KERNEL_RCSID(0, "$NetBSD: isaclock.c,v 1.12 2009/03/14 15:36:12 dsl Exp $");
 125
 126 #include <sys/param.h>
 127 #include <sys/systm.h>
 128 #include <sys/callout.h>
 129 #include <sys/time.h>
 130 #include <sys/kernel.h>
 131 #include <sys/device.h>
 132
 133 #include <machine/cpu.h>
 134 #include <machine/intr.h>
 135 #include <machine/pio.h>
 136
 137 #include <dev/isa/isareg.h>
 138 #include <dev/isa/isavar.h>
 139 #include <dev/ic/i8253reg.h>
 140 #include <sandpoint/isa/nvram.h>
 141 #include <sandpoint/isa/spkrreg.h>
 142
 143 extern void disable_intr(void); /* In locore.S */
 144 extern void enable_intr(void);  /* In locore.S */
 145
 146 void    sysbeepstop(void *);
 147 void    sysbeep(int, int);
 148
 149 static int beeping;
 150
 151 void
 152 sysbeepstop(void *arg)
 153 {
 154         /* disable counter 2 */
 155         disable_intr();
 156         isa_outb(PITAUX_PORT, isa_inb(PITAUX_PORT) & ~PIT_SPKR);
 157         enable_intr();
 158         beeping = 0;
 159 }
 160
 161 void
 162 sysbeep(int pitch, int period)
 163 {
 164         static callout_t sysbeep_ch;
 165         static int last_pitch;
 166         static bool again;
 167
 168         if (!again) {
 169                 callout_init(&sysbeep_ch, 0);
 170                 again = true;
 171         }
 172
 173         if (beeping)
 174                 callout_stop(&sysbeep_ch);
 175         if (pitch == 0 || period == 0) {
 176                 sysbeepstop(0);
 177                 last_pitch = 0;
 178                 return;
 179         }
 180         if (!beeping || last_pitch != pitch) {
 181                 disable_intr();
 182                 isa_outb(IO_TIMER1 + TIMER_MODE,
 183                          TIMER_SEL2 | TIMER_16BIT | TIMER_SQWAVE);
 184                 isa_outb(IO_TIMER1 + TIMER_CNTR2, TIMER_DIV(pitch) % 256);
 185                 isa_outb(IO_TIMER1 + TIMER_CNTR2, TIMER_DIV(pitch) / 256);
 186                 isa_outb(PITAUX_PORT, isa_inb(PITAUX_PORT) | PIT_SPKR); /* enable counter 2 */
 187                 enable_intr();
 188         }
 189         last_pitch = pitch;
 190         beeping = 1;
 191         callout_reset(&sysbeep_ch, period, sysbeepstop, NULL);
 192 }