1/*-
2 * Copyright (c) 2004-2006 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/bus.h>
33#include <sys/conf.h>
34#include <sys/kernel.h>
35#include <sys/module.h>
36
37#include <machine/bus.h>
38#include <sys/rman.h>
39#include <machine/resource.h>
40
41#include <dev/scc/scc_bus.h>
42
43#include <dev/uart/uart.h>
44#include <dev/uart/uart_bus.h>
45
46static int uart_scc_attach(device_t dev);
47static int uart_scc_probe(device_t dev);
48
49static device_method_t uart_scc_methods[] = {
50	/* Device interface */
51	DEVMETHOD(device_probe,		uart_scc_probe),
52	DEVMETHOD(device_attach,	uart_scc_attach),
53	DEVMETHOD(device_detach,	uart_bus_detach),
54	/* Serdev interface */
55	DEVMETHOD(serdev_ihand,		uart_bus_ihand),
56	DEVMETHOD(serdev_sysdev,	uart_bus_sysdev),
57	{ 0, 0 }
58};
59
60static driver_t uart_scc_driver = {
61	uart_driver_name,
62	uart_scc_methods,
63	sizeof(struct uart_softc),
64};
65
66static int
67uart_scc_attach(device_t dev)
68{
69	device_t parent;
70	struct uart_softc *sc;
71	uintptr_t mtx;
72
73	parent = device_get_parent(dev);
74	sc = device_get_softc(dev);
75
76	if (BUS_READ_IVAR(parent, dev, SCC_IVAR_HWMTX, &mtx))
77		return (ENXIO);
78	sc->sc_hwmtx = (struct mtx *)(void *)mtx;
79	return (uart_bus_attach(dev));
80}
81
82static int
83uart_scc_probe(device_t dev)
84{
85	device_t parent;
86	struct uart_softc *sc;
87	uintptr_t ch, cl, md, rs;
88
89	parent = device_get_parent(dev);
90	sc = device_get_softc(dev);
91
92	if (BUS_READ_IVAR(parent, dev, SCC_IVAR_MODE, &md) ||
93	    BUS_READ_IVAR(parent, dev, SCC_IVAR_CLASS, &cl))
94		return (ENXIO);
95	if (md != SCC_MODE_ASYNC)
96		return (ENXIO);
97	switch (cl) {
98	case SCC_CLASS_QUICC:
99		sc->sc_class = &uart_quicc_class;
100		break;
101	case SCC_CLASS_SAB82532:
102		sc->sc_class = &uart_sab82532_class;
103		break;
104	case SCC_CLASS_Z8530:
105		sc->sc_class = &uart_z8530_class;
106		break;
107	default:
108		return (ENXIO);
109	}
110	if (BUS_READ_IVAR(parent, dev, SCC_IVAR_CHANNEL, &ch) ||
111	    BUS_READ_IVAR(parent, dev, SCC_IVAR_CLOCK, &cl) ||
112	    BUS_READ_IVAR(parent, dev, SCC_IVAR_REGSHFT, &rs))
113		return (ENXIO);
114
115	return (uart_bus_probe(dev, rs, cl, 0, ch));
116}
117
118DRIVER_MODULE(uart, scc, uart_scc_driver, uart_devclass, 0, 0);
119