com_sableio.c revision 1.4 
1/* $NetBSD: com_sableio.c,v 1.4 2002/10/02 04:06:39 thorpej Exp $ */
2
3/*-
4 * Copyright (c) 1999 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
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 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by the NetBSD
21 *	Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39#include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
40
41__KERNEL_RCSID(0, "$NetBSD: com_sableio.c,v 1.4 2002/10/02 04:06:39 thorpej Exp $");
42
43#include <sys/param.h>
44#include <sys/systm.h>
45#include <sys/ioctl.h>
46#include <sys/select.h>
47#include <sys/tty.h>
48#include <sys/proc.h>
49#include <sys/user.h>
50#include <sys/conf.h>
51#include <sys/file.h>
52#include <sys/uio.h>
53#include <sys/kernel.h>
54#include <sys/syslog.h>
55#include <sys/types.h>
56#include <sys/device.h>
57
58#include <machine/intr.h>
59#include <machine/bus.h>
60
61#include <dev/ic/comreg.h>
62#include <dev/ic/comvar.h>
63
64#include <dev/pci/pcivar.h>
65#include <dev/isa/isavar.h>
66
67#include <alpha/sableio/sableiovar.h>
68
69struct com_sableio_softc {
70	struct	com_softc sc_com;	/* real "com" softc */
71
72	/* STDIO-specific goo. */
73	void	*sc_ih;			/* interrupt handler */
74};
75
76int	com_sableio_match(struct device *, struct cfdata *, void *);
77void	com_sableio_attach(struct device *, struct device *, void *);
78void	com_sableio_cleanup(void *);
79
80CFATTACH_DECL(com_sableio, sizeof(struct com_sableio_softc),
81    com_sableio_match, com_sableio_attach, NULL, NULL);
82
83int
84com_sableio_match(struct device *parent, struct cfdata *match, void *aux)
85{
86	struct sableio_attach_args *sa = aux;
87
88	/* Always present. */
89	if (strcmp(sa->sa_name, match->cf_name) == 0)
90		return (1);
91
92	return (0);
93}
94
95void
96com_sableio_attach(struct device *parent, struct device *self, void *aux)
97{
98	struct com_sableio_softc *ssc = (void *)self;
99	struct com_softc *sc = &ssc->sc_com;
100	struct sableio_attach_args *sa = aux;
101	const char *intrstr;
102
103	sc->sc_iot = sa->sa_iot;
104	sc->sc_iobase = sa->sa_ioaddr;
105
106	if (com_is_console(sc->sc_iot, sc->sc_iobase, &sc->sc_ioh) == 0 &&
107	    bus_space_map(sc->sc_iot, sc->sc_iobase, COM_NPORTS, 0,
108			  &sc->sc_ioh) != 0) {
109		printf(": can't map i/o space\n");
110		return;
111	}
112
113	sc->sc_frequency = COM_FREQ;
114
115	com_attach_subr(sc);
116
117	intrstr = pci_intr_string(sa->sa_pc, sa->sa_sableirq[0]);
118	ssc->sc_ih = pci_intr_establish(sa->sa_pc, sa->sa_sableirq[0],
119	    IPL_SERIAL, comintr, sc);
120	if (ssc->sc_ih == NULL) {
121		printf("%s: unable to establish interrupt",
122		    sc->sc_dev.dv_xname);
123		if (intrstr != NULL)
124			printf(" at %s", intrstr);
125		printf("\n");
126		return;
127	}
128	printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
129
130	/*
131	 * Shutdown hook for buggy BIOSs that don't recognize the UART
132	 * without a disabled FIFO.
133	 */
134	if (shutdownhook_establish(com_sableio_cleanup, sc) == NULL)
135		panic("com_sableio_attach: could not establish shutdown hook");
136}
137
138void
139com_sableio_cleanup(void *arg)
140{
141	struct com_softc *sc = arg;
142
143	if (ISSET(sc->sc_hwflags, COM_HW_FIFO))
144		bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_fifo, 0);
145}
146