uart_cpu_at91usart.c revision 170286 
1/*-
2 * Copyright (c) 2003 Marcel Moolenaar
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 *
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 "opt_uart.h"
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: head/sys/arm/at91/uart_cpu_at91rm9200usart.c 170286 2007-06-04 17:53:42Z marcel $");
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/bus.h>
35#include <sys/cons.h>
36#include <machine/bus.h>
37
38#include <dev/uart/uart.h>
39#include <dev/uart/uart_cpu.h>
40
41#include <arm/at91/at91rm92reg.h>
42
43bus_space_tag_t uart_bus_space_io;
44bus_space_tag_t uart_bus_space_mem;
45
46extern struct uart_class at91_usart_class;
47extern struct bus_space at91_bs_tag;
48
49int
50uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
51{
52	return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
53}
54
55int
56uart_cpu_getdev(int devtype, struct uart_devinfo *di)
57{
58	struct uart_class *class;
59
60	class = &at91_usart_class;
61	di->ops = uart_getops(class);
62	di->bas.chan = 0;
63	di->bas.bst = &at91_bs_tag;
64	/*
65	 * XXX: Not pretty, but will work because we map VA == PA early
66	 * for the last 1MB of memory.
67	 */
68#ifdef SKYEYE_WORKAROUNDS
69	di->bas.bsh = AT91RM92_BASE + AT91RM92_USART0_BASE;
70	di->baudrate = 38400;
71#else
72	di->bas.bsh = AT91RM92_BASE + AT91RM92_SYS_BASE + DBGU;
73	di->baudrate = 115200;
74#endif
75	di->bas.regshft = 0;
76	di->bas.rclk = 0;
77	di->databits = 8;
78	di->stopbits = 1;
79	di->parity = UART_PARITY_NONE;
80	uart_bus_space_io = &at91_bs_tag;
81	uart_bus_space_mem = NULL;
82	/* Check the environment for overrides */
83	uart_getenv(devtype, di, class);
84	return (0);
85}
86