uart_cpu_at91usart.c revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2003 Marcel Moolenaar
5 * Copyright (c) 2006 M. Warner Losh
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31#include "opt_platform.h"
32#include "opt_uart.h"
33
34#ifndef FDT
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD: stable/11/sys/arm/at91/uart_cpu_at91usart.c 330897 2018-03-14 03:19:51Z eadler $");
37
38#include <sys/param.h>
39#include <sys/systm.h>
40#include <sys/bus.h>
41#include <sys/cons.h>
42#include <sys/lock.h>
43#include <sys/mutex.h>
44#include <machine/bus.h>
45
46#include <dev/uart/uart.h>
47#include <dev/uart/uart_bus.h>
48#include <dev/uart/uart_cpu.h>
49
50#include <arm/at91/at91var.h>
51
52bus_space_tag_t uart_bus_space_io;
53bus_space_tag_t uart_bus_space_mem;
54
55extern struct uart_class at91_usart_class;
56
57int
58uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
59{
60	return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
61}
62
63int
64uart_cpu_getdev(int devtype, struct uart_devinfo *di)
65{
66	struct uart_class *class;
67
68	class = &at91_usart_class;
69	if (class->uc_rclk == 0 && at91_master_clock != 0)
70		class->uc_rclk = at91_master_clock;
71	di->ops = uart_getops(class);
72	di->bas.chan = 0;
73	di->bas.bst = arm_base_bs_tag;
74	/*
75	 * XXX: Not pretty, but will work because we map the needed addresses
76	 * early.  At least we probed this so that the console will work on
77         * all flavors of Atmel we can detect.
78	 */
79	di->bas.bsh = soc_info.dbgu_base;
80	di->baudrate = 115200;
81	di->bas.regshft = 0;
82	di->bas.rclk = 0;
83	di->databits = 8;
84	di->stopbits = 1;
85	di->parity = UART_PARITY_NONE;
86	uart_bus_space_io = arm_base_bs_tag;
87	uart_bus_space_mem = NULL;
88	/* Check the environment for overrides */
89	uart_getenv(devtype, di, class);
90	return (0);
91}
92#endif
93