2 * Copyright (c) 2016 The FreeBSD Foundation
5 * This software was developed by Andrew Turner under sponsorship from
6 * the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
31 #include "opt_platform.h"
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <sys/param.h>
38 #include <sys/kernel.h>
39 #include <sys/module.h>
40 #include <sys/systm.h>
45 #include <machine/bus.h>
47 #include <dev/uart/uart.h>
48 #include <dev/uart/uart_bus.h>
49 #include <dev/uart/uart_cpu.h>
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>
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>
66 * UART console routines.
68 extern struct bus_space memmap_bus;
69 bus_space_tag_t uart_bus_space_io;
70 bus_space_tag_t uart_bus_space_mem = &memmap_bus;
73 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
76 if (pmap_kextract(b1->bsh) == 0)
78 if (pmap_kextract(b2->bsh) == 0)
80 return ((pmap_kextract(b1->bsh) == pmap_kextract(b2->bsh)) ? 1 : 0);
84 uart_cpu_getdev(int devtype, struct uart_devinfo *di)
86 struct uart_class *class;
87 bus_space_handle_t bsh;
89 u_int rclk, shift, iowidth;
92 /* Allow overriding the FDT using the environment. */
93 class = &uart_ns8250_class;
94 err = uart_getenv(devtype, di, class);
99 /* Check if SPCR can tell us what console to use. */
100 if (uart_cpu_acpi_spcr(devtype, di) == 0)
104 if (devtype != UART_DEV_CONSOLE)
110 err = uart_cpu_fdt_probe(&class, &bst, &bsh, &br, &rclk,
118 * Finalize configuration.
121 di->bas.regshft = shift;
122 di->bas.regiowidth = iowidth;
125 di->ops = uart_getops(class);
128 di->parity = UART_PARITY_NONE;
131 uart_bus_space_mem = di->bas.bst;
132 uart_bus_space_io = NULL;