1 /* $NetBSD: drbbc.c,v 1.20 2012/10/27 17:17:28 chs Exp $ */
2
3 /*-
4 * Copyright (c) 1997 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Ignatios Souvatzis.
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: drbbc.c,v 1.20 2012/10/27 17:17:28 chs Exp $");
34
35 #include <sys/param.h>
36 #include <sys/kernel.h>
37 #include <sys/device.h>
38 #include <sys/systm.h>
39
40 #if 0
41 #include <machine/psl.h>
42 #endif
43 #include <machine/cpu.h>
44 #include <amiga/amiga/device.h>
45 #include <amiga/amiga/custom.h>
46 #include <amiga/amiga/cia.h>
47 #include <amiga/amiga/drcustom.h>
48 #include <amiga/dev/rtc.h>
49
50 #include <dev/clock_subr.h>
51 #include <dev/ic/ds.h>
52
53 int draco_ds_read_bit(void *);
54 void draco_ds_write_bit(void *, int);
55 void draco_ds_reset(void *);
56
57 void drbbc_attach(device_t, device_t, void *);
58 int drbbc_match(device_t, cfdata_t, void *);
59
60 int dracougettod(todr_chip_handle_t, struct timeval *);
61 int dracousettod(todr_chip_handle_t, struct timeval *);
62
63 static struct todr_chip_handle dracotodr;
64 struct drbbc_softc {
65 struct ds_handle sc_dsh;
66 };
67
68 CFATTACH_DECL_NEW(drbbc, sizeof(struct drbbc_softc),
69 drbbc_match, drbbc_attach, NULL, NULL);
70
71 struct drbbc_softc *drbbc_sc;
72
73 int
drbbc_match(device_t parent,cfdata_t cf,void * aux)74 drbbc_match(device_t parent, cfdata_t cf, void *aux)
75 {
76 static int drbbc_matched = 0;
77
78 /* Allow only one instance. */
79 if (!is_draco() || !matchname(aux, "drbbc") || drbbc_matched)
80 return (0);
81
82 drbbc_matched = 1;
83 return (1);
84 }
85
86 void
drbbc_attach(device_t parent,device_t self,void * aux)87 drbbc_attach(device_t parent, device_t self, void *aux)
88 {
89 int i;
90 struct drbbc_softc *sc;
91 u_int8_t rombuf[8];
92
93 sc = device_private(self);
94
95 sc->sc_dsh.ds_read_bit = draco_ds_read_bit;
96 sc->sc_dsh.ds_write_bit = draco_ds_write_bit;
97 sc->sc_dsh.ds_reset = draco_ds_reset;
98 sc->sc_dsh.ds_hw_handle = (void *)(DRCCADDR + DRIOCTLPG*PAGE_SIZE);
99
100 sc->sc_dsh.ds_reset(sc->sc_dsh.ds_hw_handle);
101
102 ds_write_byte(&sc->sc_dsh, DS_ROM_READ);
103 for (i=0; i<8; ++i)
104 rombuf[i] = ds_read_byte(&sc->sc_dsh);
105
106 hostid = (rombuf[3] << 24) + (rombuf[2] << 16) +
107 (rombuf[1] << 8) + rombuf[7];
108
109 printf(": ROM %02x %02x%02x%02x%02x%02x%02x %02x (DraCo sernum %ld)\n",
110 rombuf[7], rombuf[6], rombuf[5], rombuf[4],
111 rombuf[3], rombuf[2], rombuf[1], rombuf[0],
112 hostid);
113
114 drbbc_sc = sc;
115 dracotodr.cookie = sc;
116 dracotodr.todr_gettime = dracougettod;
117 dracotodr.todr_settime = dracousettod;
118 todr_attach(&dracotodr);
119 }
120
121 int
draco_ds_read_bit(void * p)122 draco_ds_read_bit(void *p)
123 {
124 struct drioct *draco_ioctl;
125
126 draco_ioctl = p;
127
128 while (draco_ioctl->io_status & DRSTAT_CLKBUSY);
129
130 draco_ioctl->io_clockw1 = 0;
131
132 while (draco_ioctl->io_status & DRSTAT_CLKBUSY);
133
134 return (draco_ioctl->io_status & DRSTAT_CLKDAT);
135 }
136
137 void
draco_ds_write_bit(void * p,int b)138 draco_ds_write_bit(void *p, int b)
139 {
140 struct drioct *draco_ioctl;
141
142 draco_ioctl = p;
143
144 while (draco_ioctl->io_status & DRSTAT_CLKBUSY);
145
146 if (b)
147 draco_ioctl->io_clockw1 = 0;
148 else
149 draco_ioctl->io_clockw0 = 0;
150 }
151
152 void
draco_ds_reset(void * p)153 draco_ds_reset(void *p)
154 {
155 struct drioct *draco_ioctl;
156
157 draco_ioctl = p;
158
159 draco_ioctl->io_clockrst = 0;
160 }
161
162 int
dracougettod(todr_chip_handle_t h,struct timeval * tvp)163 dracougettod(todr_chip_handle_t h, struct timeval *tvp)
164 {
165 u_int32_t clkbuf;
166 u_int32_t usecs;
167
168 drbbc_sc->sc_dsh.ds_reset(drbbc_sc->sc_dsh.ds_hw_handle);
169
170 ds_write_byte(&drbbc_sc->sc_dsh, DS_ROM_SKIP);
171
172 ds_write_byte(&drbbc_sc->sc_dsh, DS_MEM_READ_MEMORY);
173 /* address of seconds/256: */
174 ds_write_byte(&drbbc_sc->sc_dsh, 0x02);
175 ds_write_byte(&drbbc_sc->sc_dsh, 0x02);
176
177 usecs = (ds_read_byte(&drbbc_sc->sc_dsh) * 1000000) / 256;
178 clkbuf = ds_read_byte(&drbbc_sc->sc_dsh)
179 + (ds_read_byte(&drbbc_sc->sc_dsh)<<8)
180 + (ds_read_byte(&drbbc_sc->sc_dsh)<<16)
181 + (ds_read_byte(&drbbc_sc->sc_dsh)<<24);
182
183 /* BSD time is wrt. 1.1.1970; AmigaOS time wrt. 1.1.1978 */
184
185 clkbuf += (8*365 + 2) * 86400;
186
187 tvp->tv_sec = clkbuf;
188 tvp->tv_usec = usecs;
189
190 return (0);
191 }
192
193 int
dracousettod(todr_chip_handle_t h,struct timeval * tvp)194 dracousettod(todr_chip_handle_t h, struct timeval *tvp)
195 {
196 return (ENXIO);
197 }
198