uart_cpu_at91usart.c revision 283327 
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_platform.h"
30#include "opt_uart.h"
31
32#ifndef FDT
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: stable/10/sys/arm/at91/uart_cpu_at91usart.c 283327 2015-05-23 20:54:25Z ian $");
35
36#include <sys/param.h>
37#include <sys/systm.h>
38#include <sys/bus.h>
39#include <sys/cons.h>
40#include <sys/lock.h>
41#include <sys/mutex.h>
42#include <machine/bus.h>
43
44#include <dev/uart/uart.h>
45#include <dev/uart/uart_bus.h>
46#include <dev/uart/uart_cpu.h>
47
48#include <arm/at91/at91var.h>
49
50bus_space_tag_t uart_bus_space_io;
51bus_space_tag_t uart_bus_space_mem;
52
53extern struct bus_space at91_bs_tag;
54extern struct uart_class at91_usart_class;
55
56int
57uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
58{
59	return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
60}
61
62int
63uart_cpu_getdev(int devtype, struct uart_devinfo *di)
64{
65	struct uart_class *class;
66
67	class = &at91_usart_class;
68	if (class->uc_rclk == 0 && at91_master_clock != 0)
69		class->uc_rclk = at91_master_clock;
70	di->ops = uart_getops(class);
71	di->bas.chan = 0;
72	di->bas.bst = &at91_bs_tag;
73	/*
74	 * XXX: Not pretty, but will work because we map the needed addresses
75	 * early.  At least we probed this so that the console will work on
76         * all flavors of Atmel we can detect.
77	 */
78	di->bas.bsh = soc_info.dbgu_base;
79	di->baudrate = 115200;
80	di->bas.regshft = 0;
81	di->bas.rclk = 0;
82	di->databits = 8;
83	di->stopbits = 1;
84	di->parity = UART_PARITY_NONE;
85	uart_bus_space_io = &at91_bs_tag;
86	uart_bus_space_mem = NULL;
87	/* Check the environment for overrides */
88	uart_getenv(devtype, di, class);
89	return (0);
90}
91#endif
92