uart_bus_ixp425.c revision 340145 
1/*-
2 * Copyright (c) 2006 Kevin Lo.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#include <sys/cdefs.h>
26__FBSDID("$FreeBSD: stable/11/sys/arm/xscale/ixp425/uart_bus_ixp425.c 340145 2018-11-04 23:28:56Z mmacy $");
27
28#include <sys/param.h>
29#include <sys/systm.h>
30#include <sys/bus.h>
31#include <sys/conf.h>
32#include <sys/kernel.h>
33#include <sys/module.h>
34#include <machine/bus.h>
35#include <sys/rman.h>
36#include <machine/resource.h>
37
38#include <dev/pci/pcivar.h>
39#include <dev/ic/ns16550.h>
40
41#include <dev/uart/uart.h>
42#include <dev/uart/uart_bus.h>
43#include <dev/uart/uart_cpu.h>
44
45#include <arm/xscale/ixp425/ixp425reg.h>
46#include <arm/xscale/ixp425/ixp425var.h>
47
48#include "uart_if.h"
49
50static int uart_ixp425_probe(device_t dev);
51
52static device_method_t uart_ixp425_methods[] = {
53	/* Device interface */
54	DEVMETHOD(device_probe,		uart_ixp425_probe),
55	DEVMETHOD(device_attach,	uart_bus_attach),
56	DEVMETHOD(device_detach,	uart_bus_detach),
57	{ 0, 0 }
58};
59
60static driver_t uart_ixp425_driver = {
61	uart_driver_name,
62	uart_ixp425_methods,
63	sizeof(struct uart_softc),
64};
65DRIVER_MODULE(uart, ixp, uart_ixp425_driver, uart_devclass, 0, 0);
66
67static int
68uart_ixp425_probe(device_t dev)
69{
70	struct uart_softc *sc;
71	int unit = device_get_unit(dev);
72	u_int rclk;
73
74	sc = device_get_softc(dev);
75	sc->sc_class = &uart_ns8250_class;
76	if (resource_int_value("uart", unit, "rclk", &rclk))
77		rclk = IXP425_UART_FREQ;
78	if (bootverbose)
79		device_printf(dev, "rclk %u\n", rclk);
80
81	return uart_bus_probe(dev, 0, 0, rclk, 0, 0, 0);
82}
83