1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2009-2010 The FreeBSD Foundation
5 * All rights reserved.
6 *
7 * This software was developed by Semihalf under sponsorship from
8 * the FreeBSD Foundation.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__FBSDID("$FreeBSD$");
34
35#include "opt_platform.h"
36
37#include <sys/param.h>
38#include <sys/bus.h>
39#include <sys/kernel.h>
40#include <sys/module.h>
41#include <sys/systm.h>
42
43#include <vm/vm.h>
44#include <vm/pmap.h>
45
46#include <machine/bus.h>
47
48#include <dev/fdt/fdt_common.h>
49#include <dev/ofw/ofw_bus.h>
50#include <dev/ofw/ofw_bus_subr.h>
51#include <dev/uart/uart.h>
52#include <dev/uart/uart_bus.h>
53#include <dev/uart/uart_cpu.h>
54#include <dev/uart/uart_cpu_fdt.h>
55
56/*
57 * UART console routines.
58 */
59bus_space_tag_t uart_bus_space_io;
60bus_space_tag_t uart_bus_space_mem;
61
62int
63uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
64{
65
66	if (b1->bst != b2->bst)
67		return (0);
68	if (pmap_kextract(b1->bsh) == 0)
69		return (0);
70	if (pmap_kextract(b2->bsh) == 0)
71		return (0);
72	return ((pmap_kextract(b1->bsh) == pmap_kextract(b2->bsh)) ? 1 : 0);
73}
74
75int
76uart_cpu_getdev(int devtype, struct uart_devinfo *di)
77{
78	struct uart_class *class;
79	bus_space_tag_t bst;
80	bus_space_handle_t bsh;
81	u_int shift, iowidth, rclk;
82	int br, err;
83
84	/* Allow overriding the FDT using the environment. */
85	class = &uart_ns8250_class;
86	err = uart_getenv(devtype, di, class);
87	if (!err)
88		return (0);
89
90	err = uart_cpu_fdt_probe(&class, &bst, &bsh, &br, &rclk,
91	    &shift, &iowidth, devtype);
92	if (err != 0)
93		return (err);
94
95	/*
96	 * Finalize configuration.
97	 */
98	di->bas.chan = 0;
99	di->bas.regshft = shift;
100	di->bas.regiowidth = iowidth;
101	di->baudrate = br;
102	di->bas.rclk = rclk;
103	di->ops = uart_getops(class);
104	di->databits = 8;
105	di->stopbits = 1;
106	di->parity = UART_PARITY_NONE;
107	di->bas.bst = bst;
108	di->bas.bsh = bsh;
109
110	uart_bus_space_mem = di->bas.bst;
111	uart_bus_space_io = NULL;
112
113	return (err);
114}
115