uart_cpu_at91usart.c revision 185265 
1/*-
2 * Copyright (c) 2003 Marcel Moolenaar
3 * Copyright (c) 2006 M. Warner Losh
4 * 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 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include "opt_uart.h"
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: head/sys/arm/at91/uart_cpu_at91rm9200usart.c 185265 2008-11-25 00:13:26Z imp $");
33
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/bus.h>
37#include <sys/cons.h>
38#include <machine/bus.h>
39
40#include <dev/uart/uart.h>
41#include <dev/uart/uart_cpu.h>
42
43#include <arm/at91/at91rm92reg.h>
44
45bus_space_tag_t uart_bus_space_io;
46bus_space_tag_t uart_bus_space_mem;
47
48extern struct uart_class at91_usart_class;
49extern struct bus_space at91_bs_tag;
50
51int
52uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
53{
54	return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
55}
56
57int
58uart_cpu_getdev(int devtype, struct uart_devinfo *di)
59{
60	struct uart_class *class;
61
62	class = &at91_usart_class;
63	di->ops = uart_getops(class);
64	di->bas.chan = 0;
65	di->bas.bst = &at91_bs_tag;
66	/*
67	 * XXX: Not pretty, but will work because we map the needed addresses
68	 * early.
69	 */
70#ifdef SKYEYE_WORKAROUNDS
71	di->bas.bsh = AT91RM92_BASE + AT91RM92_USART0_BASE;
72	di->baudrate = 38400;
73#else
74	di->bas.bsh = AT91RM92_BASE + AT91RM92_SYS_BASE + DBGU;
75	di->baudrate = 115200;
76#endif
77	di->bas.regshft = 0;
78	di->bas.rclk = 0;
79	di->databits = 8;
80	di->stopbits = 1;
81	di->parity = UART_PARITY_NONE;
82	uart_bus_space_io = &at91_bs_tag;
83	uart_bus_space_mem = NULL;
84	/* Check the environment for overrides */
85	uart_getenv(devtype, di, class);
86	return (0);
87}
88