2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2009-2010 The FreeBSD Foundation
7 * This software was developed by Semihalf under sponsorship from
8 * the FreeBSD Foundation.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include "opt_platform.h"
37 #include <sys/param.h>
39 #include <sys/kernel.h>
40 #include <sys/module.h>
41 #include <sys/systm.h>
46 #include <machine/bus.h>
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>
57 * UART console routines.
59 bus_space_tag_t uart_bus_space_io;
60 bus_space_tag_t uart_bus_space_mem;
63 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
66 if (b1->bst != b2->bst)
68 if (pmap_kextract(b1->bsh) == 0)
70 if (pmap_kextract(b2->bsh) == 0)
72 return ((pmap_kextract(b1->bsh) == pmap_kextract(b2->bsh)) ? 1 : 0);
76 uart_cpu_getdev(int devtype, struct uart_devinfo *di)
78 struct uart_class *class;
80 bus_space_handle_t bsh;
81 u_int shift, iowidth, rclk;
84 /* Allow overriding the FDT using the environment. */
85 class = &uart_ns8250_class;
86 err = uart_getenv(devtype, di, class);
90 if (devtype != UART_DEV_CONSOLE)
93 err = uart_cpu_fdt_probe(&class, &bst, &bsh, &br, &rclk, &shift, &iowidth);
98 * Finalize configuration.
101 di->bas.regshft = shift;
102 di->bas.regiowidth = iowidth;
105 di->ops = uart_getops(class);
108 di->parity = UART_PARITY_NONE;
112 uart_bus_space_mem = di->bas.bst;
113 uart_bus_space_io = NULL;