2 * Copyright (c) 2003, 2004 Marcel Moolenaar
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
34 #include <machine/bus.h>
36 #include <dev/uart/uart.h>
37 #include <dev/uart/uart_cpu.h>
39 bus_space_tag_t uart_bus_space_io = AMD64_BUS_SPACE_IO;
40 bus_space_tag_t uart_bus_space_mem = AMD64_BUS_SPACE_MEM;
43 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
46 return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
50 uart_cpu_getdev(int devtype, struct uart_devinfo *di)
54 /* Check the environment. */
55 di->ops = uart_ns8250_ops;
56 if (uart_getenv(devtype, di) == 0)
60 * Scan the hints. We only try units 0 to 3 (inclusive). This
61 * covers the ISA legacy where 4 UARTs had their resources
64 for (i = 0; i < 4; i++) {
65 if (resource_int_value("uart", i, "flags", &ivar))
67 if (devtype == UART_DEV_CONSOLE && !UART_FLAGS_CONSOLE(ivar))
69 if (devtype == UART_DEV_DBGPORT && !UART_FLAGS_DBGPORT(ivar))
72 * We have a possible device. Make sure it's enabled and
73 * that we have an I/O port.
75 if (resource_int_value("uart", i, "disabled", &ivar) == 0 &&
78 if (resource_int_value("uart", i, "port", &ivar) != 0 ||
82 * Got it. Fill in the instance and return it. We only have
83 * ns8250 and successors on i386.
85 di->ops = uart_ns8250_ops;
87 di->bas.bst = uart_bus_space_io;
88 if (bus_space_map(di->bas.bst, ivar, 8, 0, &di->bas.bsh) != 0)
92 if (resource_int_value("uart", i, "baud", &ivar) != 0)
97 di->parity = UART_PARITY_NONE;