1 /* $NetBSD: com_mainbus.c,v 1.1 2021/01/27 05:24:16 simonb Exp $ */
2
3 /*-
4 * Copyright (c) 2001, 2021 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 and Simon Burge.
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> /* RCS ID & Copyright macro defns */
33
34 __KERNEL_RCSID(0, "$NetBSD: com_mainbus.c,v 1.1 2021/01/27 05:24:16 simonb Exp $");
35
36 #include <sys/param.h>
37 #include <sys/bus.h>
38 #include <sys/conf.h>
39 #include <sys/device.h>
40 #include <sys/file.h>
41 #include <sys/tty.h>
42
43 #include <evbmips/mipssim/autoconf.h>
44
45 #include <dev/ic/comreg.h>
46 #include <dev/ic/comvar.h>
47
48 struct com_mainbus_softc {
49 struct com_softc sc_com; /* real "com" softc */
50
51 /* mainbus-specific goo. */
52 void *sc_ih; /* interrupt handler */
53 };
54
55 static int com_mainbus_match(device_t, cfdata_t , void *);
56 static void com_mainbus_attach(device_t, device_t, void *);
57
58 CFATTACH_DECL_NEW(com_mainbus, sizeof(struct com_mainbus_softc),
59 com_mainbus_match, com_mainbus_attach, NULL, NULL);
60
61 int
com_mainbus_match(device_t parent,cfdata_t match,void * aux)62 com_mainbus_match(device_t parent, cfdata_t match, void *aux)
63 {
64 struct mainbus_attach_args *ma = aux;
65
66 /* Always present. */
67 if (strcmp(ma->ma_name, match->cf_name) == 0)
68 return (1);
69
70 return (0);
71 }
72
73 void
com_mainbus_attach(device_t parent,device_t self,void * aux)74 com_mainbus_attach(device_t parent, device_t self, void *aux)
75 {
76 struct com_mainbus_softc *msc = device_private(self);
77 struct com_softc *sc = &msc->sc_com;
78 struct mainbus_attach_args *ma = aux;
79 bus_space_handle_t ioh;
80
81 sc->sc_dev = self;
82 if (com_is_console(ma->ma_iot, ma->ma_addr, &ioh) == 0 &&
83 bus_space_map(ma->ma_iot, ma->ma_addr, COM_NPORTS, 0, &ioh) != 0) {
84 aprint_error(": can't map i/o space\n");
85 return;
86 }
87 com_init_regs(&sc->sc_regs, ma->ma_iot, ioh, ma->ma_addr);
88 sc->sc_frequency = COM_FREQ;
89
90 com_attach_subr(sc);
91
92 msc->sc_ih = evbmips_intr_establish(ma->ma_irq, comintr, sc);
93 if (msc->sc_ih == NULL) {
94 aprint_error_dev(self, "unable to establish interrupt\n");
95 return;
96 }
97 }
98