uart_bus_i81342.c revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2004 Olivier Houchard.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
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: stable/11/sys/arm/xscale/i8134x/uart_bus_i81342.c 330897 2018-03-14 03:19:51Z eadler $");
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#include <machine/bus.h>
37#include <sys/rman.h>
38#include <machine/resource.h>
39
40#include <dev/pci/pcivar.h>
41
42#include <dev/uart/uart.h>
43#include <dev/uart/uart_bus.h>
44#include <dev/uart/uart_cpu.h>
45
46#include <dev/ic/ns16550.h>
47
48#include "uart_if.h"
49
50static int uart_i81342_probe(device_t dev);
51
52static device_method_t uart_i81342_methods[] = {
53	/* Device interface */
54	DEVMETHOD(device_probe,		uart_i81342_probe),
55	DEVMETHOD(device_attach,	uart_bus_attach),
56	DEVMETHOD(device_detach,	uart_bus_detach),
57	{ 0, 0 }
58};
59
60static driver_t uart_i81342_driver = {
61	uart_driver_name,
62	uart_i81342_methods,
63	sizeof(struct uart_softc),
64};
65
66extern SLIST_HEAD(uart_devinfo_list, uart_devinfo) uart_sysdevs;
67static int
68uart_i81342_probe(device_t dev)
69{
70	struct uart_softc *sc;
71	int err;
72
73	sc = device_get_softc(dev);
74	sc->sc_class = &uart_ns8250_class;
75	if (device_get_unit(dev) == 0) {
76		sc->sc_sysdev = SLIST_FIRST(&uart_sysdevs);
77		bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas));
78	}
79	sc->sc_rres = bus_alloc_resource_anywhere(dev, SYS_RES_IOPORT,
80	    &sc->sc_rrid, uart_getrange(sc->sc_class), RF_ACTIVE);
81
82	sc->sc_bas.bsh = rman_get_bushandle(sc->sc_rres);
83	sc->sc_bas.bst = rman_get_bustag(sc->sc_rres);
84	bus_space_write_4(sc->sc_bas.bst, sc->sc_bas.bsh, REG_IER << 2,
85	    0x40 | 0x10);
86        bus_release_resource(dev, sc->sc_rtype, sc->sc_rrid, sc->sc_rres);
87
88	err = uart_bus_probe(dev, 2, 33334000, 0, device_get_unit(dev));
89	sc->sc_rxfifosz = sc->sc_txfifosz = 1;
90	return (err);
91}
92
93
94DRIVER_MODULE(uart, obio, uart_i81342_driver, uart_devclass, 0, 0);
95