2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2009-2010 The FreeBSD Foundation
6 * This software was developed by Semihalf under sponsorship from
7 * the FreeBSD Foundation.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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.
18 * THIS SOFTWARE IS PROVIDED BY THE 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 THE 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
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include "opt_platform.h"
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/fdt/fdt_common.h>
48 #include <dev/ofw/ofw_bus.h>
49 #include <dev/ofw/ofw_bus_subr.h>
50 #include <dev/uart/uart.h>
51 #include <dev/uart/uart_bus.h>
52 #include <dev/uart/uart_cpu.h>
53 #include <dev/uart/uart_cpu_fdt.h>
56 * UART console routines.
58 bus_space_tag_t uart_bus_space_io;
59 bus_space_tag_t uart_bus_space_mem;
62 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
65 if (b1->bst != b2->bst)
67 if (pmap_kextract(b1->bsh) == 0)
69 if (pmap_kextract(b2->bsh) == 0)
71 return ((pmap_kextract(b1->bsh) == pmap_kextract(b2->bsh)) ? 1 : 0);
75 uart_cpu_getdev(int devtype, struct uart_devinfo *di)
77 struct uart_class *class;
79 bus_space_handle_t bsh;
80 u_int shift, iowidth, rclk;
83 /* Allow overriding the FDT using the environment. */
84 class = &uart_ns8250_class;
85 err = uart_getenv(devtype, di, class);
89 err = uart_cpu_fdt_probe(&class, &bst, &bsh, &br, &rclk,
90 &shift, &iowidth, devtype);
95 * Finalize configuration.
98 di->bas.regshft = shift;
99 di->bas.regiowidth = iowidth;
102 di->ops = uart_getops(class);
105 di->parity = UART_PARITY_NONE;
109 uart_bus_space_mem = di->bas.bst;
110 uart_bus_space_io = NULL;