1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2004-2006 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/param.h>
30 #include <sys/systm.h>
31 #include <sys/bus.h>
32 #include <sys/conf.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
35
36 #include <machine/bus.h>
37 #include <sys/rman.h>
38 #include <machine/resource.h>
39
40 #include <dev/scc/scc_bus.h>
41
42 #include <dev/uart/uart.h>
43 #include <dev/uart/uart_bus.h>
44
45 static int uart_scc_attach(device_t dev);
46 static int uart_scc_probe(device_t dev);
47
48 static device_method_t uart_scc_methods[] = {
49 /* Device interface */
50 DEVMETHOD(device_probe, uart_scc_probe),
51 DEVMETHOD(device_attach, uart_scc_attach),
52 DEVMETHOD(device_detach, uart_bus_detach),
53 /* Serdev interface */
54 DEVMETHOD(serdev_ihand, uart_bus_ihand),
55 DEVMETHOD(serdev_sysdev, uart_bus_sysdev),
56 { 0, 0 }
57 };
58
59 static driver_t uart_scc_driver = {
60 uart_driver_name,
61 uart_scc_methods,
62 sizeof(struct uart_softc),
63 };
64
65 static int
uart_scc_attach(device_t dev)66 uart_scc_attach(device_t dev)
67 {
68 device_t parent;
69 struct uart_softc *sc;
70 uintptr_t mtx;
71
72 parent = device_get_parent(dev);
73 sc = device_get_softc(dev);
74
75 if (BUS_READ_IVAR(parent, dev, SCC_IVAR_HWMTX, &mtx))
76 return (ENXIO);
77 sc->sc_hwmtx = (struct mtx *)(void *)mtx;
78 return (uart_bus_attach(dev));
79 }
80
81 static int
uart_scc_probe(device_t dev)82 uart_scc_probe(device_t dev)
83 {
84 device_t parent;
85 struct uart_softc *sc;
86 uintptr_t ch, cl, md, rs;
87
88 parent = device_get_parent(dev);
89 sc = device_get_softc(dev);
90
91 if (BUS_READ_IVAR(parent, dev, SCC_IVAR_MODE, &md) ||
92 BUS_READ_IVAR(parent, dev, SCC_IVAR_CLASS, &cl))
93 return (ENXIO);
94 if (md != SCC_MODE_ASYNC)
95 return (ENXIO);
96 switch (cl) {
97 case SCC_CLASS_QUICC:
98 sc->sc_class = &uart_quicc_class;
99 break;
100 case SCC_CLASS_Z8530:
101 sc->sc_class = &uart_z8530_class;
102 break;
103 default:
104 return (ENXIO);
105 }
106 if (BUS_READ_IVAR(parent, dev, SCC_IVAR_CHANNEL, &ch) ||
107 BUS_READ_IVAR(parent, dev, SCC_IVAR_CLOCK, &cl) ||
108 BUS_READ_IVAR(parent, dev, SCC_IVAR_REGSHFT, &rs))
109 return (ENXIO);
110
111 return (uart_bus_probe(dev, rs, 0, cl, 0, ch, 0));
112 }
113
114 DRIVER_MODULE(uart, scc, uart_scc_driver, 0, 0);
115