1/*-
2 * Copyright (c) 2016 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Andrew Turner under sponsorship from
6 * the FreeBSD Foundation.
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 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include "opt_acpi.h"
31#include "opt_platform.h"
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD$");
35
36#include <sys/param.h>
37#include <sys/bus.h>
38#include <sys/kernel.h>
39#include <sys/module.h>
40#include <sys/systm.h>
41
42#include <vm/vm.h>
43#include <vm/pmap.h>
44
45#include <machine/bus.h>
46
47#include <dev/uart/uart.h>
48#include <dev/uart/uart_bus.h>
49#include <dev/uart/uart_cpu.h>
50
51#ifdef DEV_ACPI
52#include <contrib/dev/acpica/include/acpi.h>
53#include <contrib/dev/acpica/include/accommon.h>
54#include <contrib/dev/acpica/include/actables.h>
55#include <dev/uart/uart_cpu_acpi.h>
56#endif
57
58#ifdef FDT
59#include <dev/fdt/fdt_common.h>
60#include <dev/ofw/ofw_bus.h>
61#include <dev/ofw/ofw_bus_subr.h>
62#include <dev/uart/uart_cpu_fdt.h>
63#endif
64
65/*
66 * UART console routines.
67 */
68extern struct bus_space memmap_bus;
69bus_space_tag_t uart_bus_space_io;
70bus_space_tag_t uart_bus_space_mem = &memmap_bus;
71
72int
73uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
74{
75
76	if (pmap_kextract(b1->bsh) == 0)
77		return (0);
78	if (pmap_kextract(b2->bsh) == 0)
79		return (0);
80	return ((pmap_kextract(b1->bsh) == pmap_kextract(b2->bsh)) ? 1 : 0);
81}
82
83int
84uart_cpu_getdev(int devtype, struct uart_devinfo *di)
85{
86	struct uart_class *class;
87	bus_space_handle_t bsh;
88	bus_space_tag_t bst;
89	u_int rclk, shift, iowidth;
90	int br, err;
91
92	/* Allow overriding the FDT using the environment. */
93	class = &uart_ns8250_class;
94	err = uart_getenv(devtype, di, class);
95	if (err == 0)
96		return (0);
97
98#ifdef DEV_ACPI
99	/* Check if SPCR can tell us what console to use. */
100	if (uart_cpu_acpi_spcr(devtype, di) == 0)
101		return (0);
102#endif
103	err = ENXIO;
104#ifdef FDT
105	if (err != 0) {
106		err = uart_cpu_fdt_probe(&class, &bst, &bsh, &br, &rclk,
107		    &shift, &iowidth, devtype);
108	}
109#endif
110	if (err != 0)
111		return (err);
112
113	/*
114	 * Finalize configuration.
115	 */
116	di->bas.chan = 0;
117	di->bas.regshft = shift;
118	di->bas.regiowidth = iowidth;
119	di->baudrate = br;
120	di->bas.rclk = rclk;
121	di->ops = uart_getops(class);
122	di->databits = 8;
123	di->stopbits = 1;
124	di->parity = UART_PARITY_NONE;
125	di->bas.bst = bst;
126	di->bas.bsh = bsh;
127	uart_bus_space_mem = di->bas.bst;
128	uart_bus_space_io = NULL;
129
130	return (0);
131}
132