uart_cpu_powerpc.c revision 168281 
1/*-
2 * Copyright (c) 2006 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: head/sys/dev/uart/uart_cpu_powerpc.c 168281 2007-04-02 22:00:22Z marcel $");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32
33#include <machine/bus.h>
34
35#include <dev/ofw/openfirm.h>
36#include <machine/ofw_machdep.h>
37
38#include <dev/uart/uart.h>
39#include <dev/uart/uart_cpu.h>
40
41bus_space_tag_t uart_bus_space_io = PPC_BUS_SPACE_IO;
42bus_space_tag_t uart_bus_space_mem = PPC_BUS_SPACE_MEM;
43
44int
45uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
46{
47
48	return ((b1->bsh == b2->bsh) ? 1 : 0);
49}
50
51int
52uart_cpu_getdev(int devtype, struct uart_devinfo *di)
53{
54	char buf[64];
55	struct uart_class *class;
56	phandle_t input, opts;
57	int error;
58
59	class = &uart_z8530_class;
60	if (class == NULL)
61		return (ENXIO);
62
63	if ((opts = OF_finddevice("/options")) == -1)
64		return (ENXIO);
65	switch (devtype) {
66	case UART_DEV_CONSOLE:
67		if (OF_getprop(opts, "input-device", buf, sizeof(buf)) == -1)
68			return (ENXIO);
69		input = OF_finddevice(buf);
70		if (input == -1)
71			return (ENXIO);
72		if (OF_getprop(opts, "output-device", buf, sizeof(buf)) == -1)
73			return (ENXIO);
74		if (OF_finddevice(buf) != input)
75			return (ENXIO);
76		break;
77	case UART_DEV_DBGPORT:
78		if (!getenv_string("hw.uart.dbgport", buf, sizeof(buf)))
79			return (ENXIO);
80		input = OF_finddevice(buf);
81		if (input == -1)
82			return (ENXIO);
83		break;
84	default:
85		return (EINVAL);
86	}
87
88	if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1)
89		return (ENXIO);
90	if (strcmp(buf, "serial") != 0)
91		return (ENXIO);
92	if (OF_getprop(input, "name", buf, sizeof(buf)) == -1)
93		return (ENXIO);
94	if (strcmp(buf, "ch-a"))
95		return (ENXIO);
96
97	error = OF_decode_addr(input, 0, &di->bas.bst, &di->bas.bsh);
98	if (error)
99		return (error);
100
101	di->ops = uart_getops(class);
102
103	di->bas.rclk = 230400;
104	di->bas.chan = 1;
105	di->bas.regshft = 4;
106
107	di->baudrate = 0;
108	di->databits = 8;
109	di->stopbits = 1;
110	di->parity = UART_PARITY_NONE;
111	return (0);
112}
113