1/*-
2 * Copyright (c) 2003 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
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.
14 *
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.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/bus.h>
33#include <sys/cons.h>
34#include <machine/bus.h>
35
36#include <dev/uart/uart.h>
37#include <dev/uart/uart_cpu.h>
38
39#include <arm/xscale/ixp425/ixp425reg.h>
40#include <arm/xscale/ixp425/ixp425var.h>
41
42bus_space_tag_t uart_bus_space_io;
43bus_space_tag_t uart_bus_space_mem;
44
45int
46uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
47{
48	return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
49}
50
51int
52uart_cpu_getdev(int devtype, struct uart_devinfo *di)
53{
54	uint32_t i, ivar, vaddr;
55
56	/*
57	 * Scan the hints. The IXP425 only have 2 serial ports, so only
58	 * scan them.
59	 */
60	for (i = 0; i < 2; i++) {
61		if (resource_int_value("uart", i, "flags", &ivar))
62			continue;
63		if (devtype == UART_DEV_CONSOLE && !UART_FLAGS_CONSOLE(ivar))
64			continue;
65		if (devtype == UART_DEV_DBGPORT && !UART_FLAGS_DBGPORT(ivar))
66			continue;
67		/*
68		 * We have a possible device. Make sure it's enabled and
69		 * that we have an I/O port.
70		 */
71		if (resource_int_value("uart", i, "disabled", &ivar) == 0 &&
72		    ivar != 0)
73			continue;
74		if (resource_int_value("uart", i, "addr", &ivar) != 0 ||
75		    ivar == 0)
76			continue;
77		/* Got it. Fill in the instance and return it. */
78		di->ops = uart_getops(&uart_ns8250_class);
79		di->bas.chan = 0;
80		di->bas.bst = &ixp425_a4x_bs_tag;
81		di->bas.regshft = 0;
82		di->bas.rclk = IXP425_UART_FREQ;
83		di->baudrate = 115200;
84		di->databits = 8;
85		di->stopbits = 1;
86		di->parity = UART_PARITY_NONE;
87		uart_bus_space_io = NULL;
88		uart_bus_space_mem = &ixp425_a4x_bs_tag;
89
90		getvbase(ivar, IXP425_REG_SIZE, &vaddr);
91		di->bas.bsh = vaddr;
92		return (0);
93	}
94
95	return (ENXIO);
96}
97