xref: /freebsd/sys/dev/scc/scc_bfe_macio.c (revision b61a573019428cbdc38ed03be9ecd2482011ea66)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c) 2006 Marcel Moolenaar
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  *
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31 
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/bus.h>
35 #include <sys/conf.h>
36 #include <sys/kernel.h>
37 #include <sys/module.h>
38 
39 #include <dev/ofw/ofw_bus.h>
40 
41 #include <machine/bus.h>
42 #include <sys/rman.h>
43 #include <machine/resource.h>
44 
45 #include <dev/scc/scc_bfe.h>
46 
47 #define	MACIO_REGSHFT	4
48 #define	MACIO_RCLK	230400
49 
50 static int
51 scc_macio_probe(device_t dev)
52 {
53 	struct scc_softc *sc;
54 	const char *nm;
55 
56 	sc = device_get_softc(dev);
57 	nm = ofw_bus_get_name(dev);
58 	/* Attach to modern escc (channel shift 4 bits) */
59 	if (!strcmp(nm, "escc")) {
60 		device_set_desc(dev, "Zilog Z8530 dual channel SCC");
61 		sc->sc_class = &scc_z8530_escc_class;
62 		return (scc_bfe_probe(dev, MACIO_REGSHFT, MACIO_RCLK, 0));
63 	}
64 	return (ENXIO);
65 }
66 
67 static int
68 scc_macio_attach(device_t dev)
69 {
70 
71 	return (scc_bfe_attach(dev, 3));
72 }
73 
74 static device_method_t scc_macio_methods[] = {
75 	/* Device interface */
76 	DEVMETHOD(device_probe,		scc_macio_probe),
77 	DEVMETHOD(device_attach,	scc_macio_attach),
78 	DEVMETHOD(device_detach,	scc_bfe_detach),
79 
80 	DEVMETHOD(bus_alloc_resource,	scc_bus_alloc_resource),
81 	DEVMETHOD(bus_release_resource,	scc_bus_release_resource),
82 	DEVMETHOD(bus_get_resource,	scc_bus_get_resource),
83 	DEVMETHOD(bus_read_ivar,	scc_bus_read_ivar),
84 	DEVMETHOD(bus_setup_intr,	scc_bus_setup_intr),
85 	DEVMETHOD(bus_teardown_intr,	scc_bus_teardown_intr),
86 
87 	DEVMETHOD_END
88 };
89 
90 static driver_t scc_macio_driver = {
91 	scc_driver_name,
92 	scc_macio_methods,
93 	sizeof(struct scc_softc),
94 };
95 
96 DRIVER_MODULE(scc, macio, scc_macio_driver, NULL, NULL);
97