1/*	$NetBSD: mcclock_isa.c,v 1.14 2011/02/08 20:20:09 rmind Exp $	*/
2/*	$OpenBSD: clock_mc.c,v 1.9 1998/03/16 09:38:26 pefo Exp $	*/
3/*	NetBSD: clock_mc.c,v 1.2 1995/06/28 04:30:30 cgd Exp 	*/
4
5/*
6 * Copyright (c) 1988 University of Utah.
7 * Copyright (c) 1992, 1993
8 *	The Regents of the University of California.  All rights reserved.
9 *
10 * This code is derived from software contributed to Berkeley by
11 * the Systems Programming Group of the University of Utah Computer
12 * Science Department and Ralph Campbell.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 *    notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 *    notice, this list of conditions and the following disclaimer in the
21 *    documentation and/or other materials provided with the distribution.
22 * 3. Neither the name of the University nor the names of its contributors
23 *    may be used to endorse or promote products derived from this software
24 *    without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * from: Utah Hdr: clock.c 1.18 91/01/21
39 *
40 *	@(#)clock.c	8.1 (Berkeley) 6/10/93
41 */
42
43#include <sys/cdefs.h>
44__KERNEL_RCSID(0, "$NetBSD: mcclock_isa.c,v 1.14 2011/02/08 20:20:09 rmind Exp $");
45
46#include <sys/param.h>
47#include <sys/systm.h>
48#include <sys/device.h>
49
50#include <sys/bus.h>
51
52#include <dev/isa/isareg.h>
53#include <dev/isa/isavar.h>
54
55#include <dev/clock_subr.h>
56
57#include <dev/ic/mc146818reg.h>
58#include <dev/ic/mc146818var.h>
59
60#include <arc/isa/mcclock_isavar.h>
61
62int mcclock_isa_match(device_t, cfdata_t, void *);
63void mcclock_isa_attach(device_t, device_t, void *);
64
65CFATTACH_DECL_NEW(mcclock_isa, sizeof(struct mc146818_softc),
66    mcclock_isa_match, mcclock_isa_attach, NULL, NULL);
67
68/* Deskstation clock access code */
69static u_int mc_isa_read(struct mc146818_softc *, u_int);
70static void mc_isa_write(struct mc146818_softc *, u_int, u_int);
71
72int mcclock_isa_conf = 0;
73
74int
75mcclock_isa_match(device_t parent, cfdata_t cf, void *aux)
76{
77	struct isa_attach_args *ia = aux;
78	bus_space_handle_t ioh;
79
80	if (ia->ia_nio < 1 ||
81	    (ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT &&
82	     ia->ia_io[0].ir_addr != 0x70))
83		return 0;
84
85	if (ia->ia_niomem > 0 &&
86	    (ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM))
87		return 0;
88
89	if (ia->ia_nirq > 0 &&
90	    (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ))
91		return 0;
92
93	if (ia->ia_ndrq > 0 &&
94	    (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ))
95		return 0;
96
97	if (!mcclock_isa_conf)
98		return 0;
99
100	if (bus_space_map(ia->ia_iot, 0x70, 0x02, 0, &ioh))
101		return 0;
102
103	bus_space_unmap(ia->ia_iot, ioh, 0x02);
104
105	ia->ia_nio = 1;
106	ia->ia_io[0].ir_addr = 0x70;
107	ia->ia_io[0].ir_size = 0x02;
108
109	ia->ia_niomem = 0;
110	ia->ia_nirq = 0;
111	ia->ia_ndrq = 0;
112
113	return 1;
114}
115
116void
117mcclock_isa_attach(device_t parent, device_t self, void *aux)
118{
119	struct mc146818_softc *sc = device_private(self);
120	struct isa_attach_args *ia = aux;
121
122	sc->sc_dev = self;
123	sc->sc_bst = ia->ia_iot;
124	if (bus_space_map(sc->sc_bst, ia->ia_io[0].ir_addr,
125	    ia->ia_io[0].ir_size, 0, &sc->sc_bsh))
126		panic("mcclock_isa_attach: couldn't map clock I/O space");
127
128	sc->sc_year0 = 1980;
129	sc->sc_mcread  = mc_isa_read;
130	sc->sc_mcwrite = mc_isa_write;
131
132	mc146818_attach(sc);
133
134	aprint_normal("\n");
135
136	/* Turn interrupts off, just in case. */
137	mc_isa_write(sc, MC_REGB, MC_REGB_BINARY | MC_REGB_24HR);
138}
139
140u_int
141mc_isa_read(struct mc146818_softc *sc, u_int reg)
142{
143
144	bus_space_write_1(sc->sc_bst, sc->sc_bsh, 0, reg);
145	return bus_space_read_1(sc->sc_bst, sc->sc_bsh, 1);
146}
147
148void
149mc_isa_write(struct mc146818_softc *sc, u_int reg, u_int datum)
150{
151
152	bus_space_write_1(sc->sc_bst, sc->sc_bsh, 0, reg);
153	bus_space_write_1(sc->sc_bst, sc->sc_bsh, 1, datum);
154}
155
156