1/*	$NetBSD: drbbc.c,v 1.19 2010/12/20 00:25:25 matt 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 1.19 2010/12/20 00:25:25 matt 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
53int draco_ds_read_bit(void *);
54void draco_ds_write_bit(void *, int);
55void draco_ds_reset(void *);
56
57void drbbc_attach(device_t, device_t, void *);
58int drbbc_match(device_t, cfdata_t, void *);
59
60int dracougettod(todr_chip_handle_t, struct timeval *);
61int dracousettod(todr_chip_handle_t, struct timeval *);
62
63static struct todr_chip_handle dracotodr;
64struct drbbc_softc {
65	struct ds_handle sc_dsh;
66};
67
68CFATTACH_DECL_NEW(drbbc, sizeof(struct drbbc_softc),
69    drbbc_match, drbbc_attach, NULL, NULL);
70
71struct drbbc_softc *drbbc_sc;
72
73int
74drbbc_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
86void
87drbbc_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
121int
122draco_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
137void
138draco_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
152void
153draco_ds_reset(void *p)
154{
155	struct drioct *draco_ioctl;
156
157	draco_ioctl = p;
158
159	draco_ioctl->io_clockrst = 0;
160}
161
162int
163dracougettod(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
193int
194dracousettod(todr_chip_handle_t h, struct timeval *tvp)
195{
196	return (ENXIO);
197}
198