uart_bus_at91usart.c revision 217036 
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 217036 2011-01-05 23:45:07Z 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/uart/uart.h>
42#include <dev/uart/uart_bus.h>
43#include <dev/uart/uart_cpu.h>
44
45#include <arm/at91/at91rm92reg.h>
46#include <arm/at91/at91var.h>
47
48#include "uart_if.h"
49
50static int usart_at91rm92_probe(device_t dev);
51
52extern struct uart_class at91_usart_class;
53
54static device_method_t usart_at91rm92_methods[] = {
55	/* Device interface */
56	DEVMETHOD(device_probe,		usart_at91rm92_probe),
57	DEVMETHOD(device_attach,	uart_bus_attach),
58	DEVMETHOD(device_detach,	uart_bus_detach),
59	{ 0, 0 }
60};
61
62static driver_t usart_at91rm92_driver = {
63	uart_driver_name,
64	usart_at91rm92_methods,
65	sizeof(struct uart_softc),
66};
67
68extern SLIST_HEAD(uart_devinfo_list, uart_devinfo) uart_sysdevs;
69
70static int
71usart_at91rm92_probe(device_t dev)
72{
73	struct uart_softc *sc;
74
75	sc = device_get_softc(dev);
76	switch (device_get_unit(dev))
77	{
78	case 0:
79		device_set_desc(dev, "DBGU");
80		/*
81		 * Setting sc_sysdev makes this device a 'system device' and
82		 * indirectly makes it the system console.
83		 */
84		sc->sc_sysdev = SLIST_FIRST(&uart_sysdevs);
85		bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas));
86		break;
87	case 1:
88		device_set_desc(dev, "USART0");
89		break;
90	case 2:
91		device_set_desc(dev, "USART1");
92		break;
93	case 3:
94		device_set_desc(dev, "USART2");
95		break;
96	case 4:
97		device_set_desc(dev, "USART3");
98		break;
99	}
100	sc->sc_class = &at91_usart_class;
101	if (sc->sc_class->uc_rclk == 0)
102		sc->sc_class->uc_rclk = at91_master_clock;
103	return (uart_bus_probe(dev, 0, 0, 0, device_get_unit(dev)));
104}
105
106
107DRIVER_MODULE(uart, atmelarm, usart_at91rm92_driver, uart_devclass, 0, 0);
108