1/*	$NetBSD: drbbc.c,v 1.18 2009/12/12 14:44:08 tsutsui 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 1.18 2009/12/12 14:44:08 tsutsui 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(struct device *, struct device *, void *);
58int drbbc_match(struct device *, struct cfdata *, 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 device sc_dev;
66	struct ds_handle sc_dsh;
67};
68
69CFATTACH_DECL(drbbc, sizeof(struct drbbc_softc),
70    drbbc_match, drbbc_attach, NULL, NULL);
71
72struct drbbc_softc *drbbc_sc;
73
74int
75drbbc_match(struct device *pdp, struct cfdata *cfp, void *auxp)
76{
77	static int drbbc_matched = 0;
78
79	/* Allow only one instance. */
80	if (!is_draco() || !matchname(auxp, "drbbc") || drbbc_matched)
81		return (0);
82
83	drbbc_matched = 1;
84	return (1);
85}
86
87void
88drbbc_attach(struct device *pdp, struct device *dp, void *auxp)
89{
90	int i;
91	struct drbbc_softc *sc;
92	u_int8_t rombuf[8];
93
94	sc = (struct drbbc_softc *)dp;
95
96	sc->sc_dsh.ds_read_bit = draco_ds_read_bit;
97	sc->sc_dsh.ds_write_bit = draco_ds_write_bit;
98	sc->sc_dsh.ds_reset = draco_ds_reset;
99	sc->sc_dsh.ds_hw_handle = (void *)(DRCCADDR + DRIOCTLPG*PAGE_SIZE);
100
101	sc->sc_dsh.ds_reset(sc->sc_dsh.ds_hw_handle);
102
103	ds_write_byte(&sc->sc_dsh, DS_ROM_READ);
104	for (i=0; i<8; ++i)
105		rombuf[i] = ds_read_byte(&sc->sc_dsh);
106
107	hostid = (rombuf[3] << 24) + (rombuf[2] << 16) +
108		(rombuf[1] << 8) + rombuf[7];
109
110	printf(": ROM %02x %02x%02x%02x%02x%02x%02x %02x (DraCo sernum %ld)\n",
111		rombuf[7], rombuf[6], rombuf[5], rombuf[4],
112		rombuf[3], rombuf[2], rombuf[1], rombuf[0],
113		hostid);
114
115	drbbc_sc = sc;
116	dracotodr.cookie = sc;
117	dracotodr.todr_gettime = dracougettod;
118	dracotodr.todr_settime = dracousettod;
119	todr_attach(&dracotodr);
120}
121
122int
123draco_ds_read_bit(void *p)
124{
125	struct drioct *draco_ioctl;
126
127	draco_ioctl = p;
128
129	while (draco_ioctl->io_status & DRSTAT_CLKBUSY);
130
131	draco_ioctl->io_clockw1 = 0;
132
133	while (draco_ioctl->io_status & DRSTAT_CLKBUSY);
134
135	return (draco_ioctl->io_status & DRSTAT_CLKDAT);
136}
137
138void
139draco_ds_write_bit(void *p, int b)
140{
141	struct drioct *draco_ioctl;
142
143	draco_ioctl = p;
144
145	while (draco_ioctl->io_status & DRSTAT_CLKBUSY);
146
147	if (b)
148		draco_ioctl->io_clockw1 = 0;
149	else
150		draco_ioctl->io_clockw0 = 0;
151}
152
153void
154draco_ds_reset(void *p)
155{
156	struct drioct *draco_ioctl;
157
158	draco_ioctl = p;
159
160	draco_ioctl->io_clockrst = 0;
161}
162
163int
164dracougettod(todr_chip_handle_t h, struct timeval *tvp)
165{
166	u_int32_t clkbuf;
167	u_int32_t usecs;
168
169	drbbc_sc->sc_dsh.ds_reset(drbbc_sc->sc_dsh.ds_hw_handle);
170
171	ds_write_byte(&drbbc_sc->sc_dsh, DS_ROM_SKIP);
172
173	ds_write_byte(&drbbc_sc->sc_dsh, DS_MEM_READ_MEMORY);
174	/* address of seconds/256: */
175	ds_write_byte(&drbbc_sc->sc_dsh, 0x02);
176	ds_write_byte(&drbbc_sc->sc_dsh, 0x02);
177
178	usecs = (ds_read_byte(&drbbc_sc->sc_dsh) * 1000000) / 256;
179	clkbuf = ds_read_byte(&drbbc_sc->sc_dsh)
180	    + (ds_read_byte(&drbbc_sc->sc_dsh)<<8)
181	    + (ds_read_byte(&drbbc_sc->sc_dsh)<<16)
182	    + (ds_read_byte(&drbbc_sc->sc_dsh)<<24);
183
184	/* BSD time is wrt. 1.1.1970; AmigaOS time wrt. 1.1.1978 */
185
186	clkbuf += (8*365 + 2) * 86400;
187
188	tvp->tv_sec = clkbuf;
189	tvp->tv_usec = usecs;
190
191	return (0);
192}
193
194int
195dracousettod(todr_chip_handle_t h, struct timeval *tvp)
196{
197	return (ENXIO);
198}
199