1/* $NetBSD: mcclock_tlsb.c,v 1.16 2008/03/29 05:42:45 tsutsui Exp $ */
2
3/*
4 * Copyright (c) 1997 by Matthew Jacob
5 * NASA AMES Research Center.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice immediately at the beginning of the file, without modification,
13 *    this list of conditions, and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. The name of the author may not be used to endorse or promote products
18 *    derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
24 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
34
35__KERNEL_RCSID(0, "$NetBSD: mcclock_tlsb.c,v 1.16 2008/03/29 05:42:45 tsutsui Exp $");
36
37#include <sys/param.h>
38#include <sys/kernel.h>
39#include <sys/systm.h>
40#include <sys/device.h>
41
42#include <sys/bus.h>
43
44#include <alpha/tlsb/gbusvar.h>
45
46#include <alpha/tlsb/tlsbreg.h>		/* XXX */
47
48#include <dev/clock_subr.h>
49
50#include <dev/ic/mc146818reg.h>
51#include <dev/ic/mc146818var.h>
52
53#include <alpha/alpha/mcclockvar.h>
54
55#include "ioconf.h"
56
57#define	KV(_addr)	((void *)ALPHA_PHYS_TO_K0SEG((_addr)))
58/*
59 * Registers are 64 bytes apart (and 1 byte wide)
60 */
61#define	REGSHIFT	6
62
63struct mcclock_tlsb_softc {
64	struct mc146818_softc	sc_mc146818;
65	unsigned long regbase;
66};
67
68int	mcclock_tlsb_match(device_t, cfdata_t, void *);
69void	mcclock_tlsb_attach(device_t, device_t, void *);
70
71CFATTACH_DECL_NEW(mcclock_tlsb, sizeof(struct mcclock_tlsb_softc),
72    mcclock_tlsb_match, mcclock_tlsb_attach, NULL, NULL);
73
74static void	mcclock_tlsb_write(struct mc146818_softc *, u_int, u_int);
75static u_int	mcclock_tlsb_read(struct mc146818_softc *, u_int);
76
77
78int
79mcclock_tlsb_match(device_t parent, cfdata_t cf, void *aux)
80{
81	struct gbus_attach_args *ga = aux;
82
83	if (strcmp(ga->ga_name, mcclock_cd.cd_name))
84		return (0);
85	return (1);
86}
87
88void
89mcclock_tlsb_attach(device_t parent, device_t self, void *aux)
90{
91	struct mcclock_tlsb_softc *tsc = device_private(self);
92	struct gbus_attach_args *ga = aux;
93	struct mc146818_softc *sc = &tsc->sc_mc146818;
94
95	/* XXX Should be bus.h'd, so we can accommodate the kn7aa. */
96	tsc->regbase = TLSB_GBUS_BASE + ga->ga_offset;
97
98	sc->sc_dev = self;
99	sc->sc_mcread  = mcclock_tlsb_read;
100	sc->sc_mcwrite = mcclock_tlsb_write;
101
102	mcclock_attach(sc);
103}
104
105static void
106mcclock_tlsb_write(struct mc146818_softc *sc, u_int reg, u_int val)
107{
108	struct mcclock_tlsb_softc *tsc = (void *)sc;
109	unsigned char *ptr = (unsigned char *)
110		KV(tsc->regbase + (reg << REGSHIFT));
111
112	*ptr = val;
113}
114
115static u_int
116mcclock_tlsb_read(struct mc146818_softc *sc, u_int reg)
117{
118	struct mcclock_tlsb_softc *tsc = (void *)sc;
119	unsigned char *ptr = (unsigned char *)
120		KV(tsc->regbase + (reg << REGSHIFT));
121
122	return *ptr;
123}
124