uart_bus_at91usart.c revision 185265 
1/*-
2 * Copyright (c) 2005 Olivier Houchard.  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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26#include "opt_uart.h"
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD: head/sys/arm/at91/uart_bus_at91usart.c 185265 2008-11-25 00:13:26Z imp $");
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/bus.h>
34#include <sys/conf.h>
35#include <sys/kernel.h>
36#include <sys/module.h>
37#include <machine/bus.h>
38#include <sys/rman.h>
39#include <machine/resource.h>
40
41#include <dev/pci/pcivar.h>
42
43#include <dev/uart/uart.h>
44#include <dev/uart/uart_bus.h>
45#include <dev/uart/uart_cpu.h>
46
47#include <arm/at91/at91rm92reg.h>
48
49#include "uart_if.h"
50
51static int usart_at91rm92_probe(device_t dev);
52
53extern struct uart_class at91_usart_class;
54
55static device_method_t usart_at91rm92_methods[] = {
56	/* Device interface */
57	DEVMETHOD(device_probe,		usart_at91rm92_probe),
58	DEVMETHOD(device_attach,	uart_bus_attach),
59	DEVMETHOD(device_detach,	uart_bus_detach),
60	{ 0, 0 }
61};
62
63static driver_t usart_at91rm92_driver = {
64	uart_driver_name,
65	usart_at91rm92_methods,
66	sizeof(struct uart_softc),
67};
68
69extern SLIST_HEAD(uart_devinfo_list, uart_devinfo) uart_sysdevs;
70
71static int
72usart_at91rm92_probe(device_t dev)
73{
74	struct uart_softc *sc;
75
76	sc = device_get_softc(dev);
77	switch (device_get_unit(dev))
78	{
79	case 0:
80#ifdef SKYEYE_WORKAROUNDS
81		device_set_desc(dev, "USART0");
82#else
83		device_set_desc(dev, "DBGU");
84#endif
85		/*
86		 * Setting sc_sysdev makes this device a 'system device' and
87		 * indirectly makes it the system console.
88		 */
89		sc->sc_sysdev = SLIST_FIRST(&uart_sysdevs);
90		bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas));
91		break;
92	case 1:
93		device_set_desc(dev, "USART0");
94		break;
95	case 2:
96		device_set_desc(dev, "USART1");
97		break;
98	case 3:
99		device_set_desc(dev, "USART2");
100		break;
101	case 4:
102		device_set_desc(dev, "USART3");
103		break;
104	}
105	sc->sc_class = &at91_usart_class;
106	return (uart_bus_probe(dev, 0, 0, 0, device_get_unit(dev)));
107}
108
109
110DRIVER_MODULE(uart, atmelarm, usart_at91rm92_driver, uart_devclass, 0, 0);
111