1/*-
2 * Copyright (c) 2001 by Thomas Moestl <tmm@FreeBSD.org>.
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 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
18 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
20 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
21 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * 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/kernel.h>
34#include <sys/module.h>
35
36#include <dev/ofw/ofw_bus.h>
37
38#include <machine/bus.h>
39#include <sys/rman.h>
40#include <machine/resource.h>
41#include <machine/ver.h>
42
43#include <dev/uart/uart.h>
44#include <dev/uart/uart_bus.h>
45#include <dev/uart/uart_cpu.h>
46
47static int uart_ebus_probe(device_t dev);
48
49static device_method_t uart_ebus_methods[] = {
50	/* Device interface */
51	DEVMETHOD(device_probe,		uart_ebus_probe),
52	DEVMETHOD(device_attach,	uart_bus_attach),
53	DEVMETHOD(device_detach,	uart_bus_detach),
54	{ 0, 0 }
55};
56
57static driver_t uart_ebus_driver = {
58	uart_driver_name,
59	uart_ebus_methods,
60	sizeof(struct uart_softc),
61};
62
63static int
64uart_ebus_probe(device_t dev)
65{
66	const char *nm, *cmpt;
67	struct uart_softc *sc;
68	struct uart_devinfo dummy;
69
70	sc = device_get_softc(dev);
71	sc->sc_class = NULL;
72
73	nm = ofw_bus_get_name(dev);
74	cmpt = ofw_bus_get_compat(dev);
75	if (cmpt == NULL)
76		cmpt = "";
77	if (!strcmp(nm, "lom-console") || !strcmp(nm, "su") ||
78	    !strcmp(nm, "su_pnp") || !strcmp(cmpt, "rsc-console") ||
79	    !strcmp(cmpt, "rsc-control") || !strcmp(cmpt, "su") ||
80	    !strcmp(cmpt, "su16550") || !strcmp(cmpt, "su16552")) {
81		/*
82		 * On AXi and AXmp boards the NS16550 (used to connect
83		 * keyboard/mouse) share their IRQ lines with the i8042.
84		 * Any IRQ activity (typically during attach) of the
85		 * NS16550 used to connect the keyboard when actually the
86		 * PS/2 keyboard is selected in OFW causes interaction
87		 * with the OBP i8042 driver resulting in a hang and vice
88		 * versa. As RS232 keyboards and mice obviously aren't
89		 * meant to be used in parallel with PS/2 ones on these
90		 * boards don't attach to the NS16550 in case the RS232
91		 * keyboard isn't selected in order to prevent such hangs.
92		 */
93		if ((!strcmp(sparc64_model, "SUNW,UltraAX-MP") ||
94		    !strcmp(sparc64_model, "SUNW,UltraSPARC-IIi-Engine")) &&
95		    uart_cpu_getdev(UART_DEV_KEYBOARD, &dummy)) {
96				device_disable(dev);
97				return (ENXIO);
98		}
99		sc->sc_class = &uart_ns8250_class;
100		return (uart_bus_probe(dev, 0, 0, 0, 0));
101	}
102
103	return (ENXIO);
104}
105
106DRIVER_MODULE(uart, ebus, uart_ebus_driver, uart_devclass, 0, 0);
107