1 /* $NetBSD: mcclock_isa.c,v 1.15 2011/07/01 19:25:41 dyoung 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 1.15 2011/07/01 19:25:41 dyoung 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
62 int mcclock_isa_match(device_t, cfdata_t, void *);
63 void mcclock_isa_attach(device_t, device_t, void *);
64
65 CFATTACH_DECL_NEW(mcclock_isa, sizeof(struct mc146818_softc),
66 mcclock_isa_match, mcclock_isa_attach, NULL, NULL);
67
68 /* Deskstation clock access code */
69 static u_int mc_isa_read(struct mc146818_softc *, u_int);
70 static void mc_isa_write(struct mc146818_softc *, u_int, u_int);
71
72 int mcclock_isa_conf = 0;
73
74 int
mcclock_isa_match(device_t parent,cfdata_t cf,void * aux)75 mcclock_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
116 void
mcclock_isa_attach(device_t parent,device_t self,void * aux)117 mcclock_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
140 u_int
mc_isa_read(struct mc146818_softc * sc,u_int reg)141 mc_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
148 void
mc_isa_write(struct mc146818_softc * sc,u_int reg,u_int datum)149 mc_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