uart_cpu_powerpc.c revision 176771 
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 176771 2008-03-03 17:17:00Z raj $");
29
30#include "opt_platform.h"
31
32#include <sys/param.h>
33#include <sys/systm.h>
34
35#include <machine/bus.h>
36
37#ifndef MPC85XX
38#include <dev/ofw/openfirm.h>
39#include <machine/ofw_machdep.h>
40#endif
41
42#include <dev/uart/uart.h>
43#include <dev/uart/uart_cpu.h>
44
45#ifdef MPC85XX
46bus_space_tag_t uart_bus_space_io = &bs_be_tag;
47bus_space_tag_t uart_bus_space_mem = &bs_be_tag;
48#else
49bus_space_tag_t uart_bus_space_io = &bs_le_tag;
50bus_space_tag_t uart_bus_space_mem = &bs_le_tag;
51#endif
52
53int
54uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
55{
56
57	return ((b1->bsh == b2->bsh) ? 1 : 0);
58}
59
60#ifdef MPC85XX
61int
62uart_cpu_getdev(int devtype, struct uart_devinfo *di)
63{
64	struct uart_class *class;
65
66	class = &uart_ns8250_class;
67	if (class == NULL)
68		class = &uart_quicc_class;
69	if (class == NULL)
70		return (ENXIO);
71
72	/* Check the environment. */
73	return (uart_getenv(devtype, di, class));
74}
75#else
76int
77uart_cpu_getdev(int devtype, struct uart_devinfo *di)
78{
79	char buf[64];
80	struct uart_class *class;
81	phandle_t input, opts;
82	int error;
83
84	class = &uart_z8530_class;
85	if (class == NULL)
86		return (ENXIO);
87
88	if ((opts = OF_finddevice("/options")) == -1)
89		return (ENXIO);
90	switch (devtype) {
91	case UART_DEV_CONSOLE:
92		if (OF_getprop(opts, "input-device", buf, sizeof(buf)) == -1)
93			return (ENXIO);
94		input = OF_finddevice(buf);
95		if (input == -1)
96			return (ENXIO);
97		if (OF_getprop(opts, "output-device", buf, sizeof(buf)) == -1)
98			return (ENXIO);
99		if (OF_finddevice(buf) != input)
100			return (ENXIO);
101		break;
102	case UART_DEV_DBGPORT:
103		if (!getenv_string("hw.uart.dbgport", buf, sizeof(buf)))
104			return (ENXIO);
105		input = OF_finddevice(buf);
106		if (input == -1)
107			return (ENXIO);
108		break;
109	default:
110		return (EINVAL);
111	}
112
113	if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1)
114		return (ENXIO);
115	if (strcmp(buf, "serial") != 0)
116		return (ENXIO);
117	if (OF_getprop(input, "name", buf, sizeof(buf)) == -1)
118		return (ENXIO);
119	if (strcmp(buf, "ch-a"))
120		return (ENXIO);
121
122	error = OF_decode_addr(input, 0, &di->bas.bst, &di->bas.bsh);
123	if (error)
124		return (error);
125
126	di->ops = uart_getops(class);
127
128	di->bas.rclk = 230400;
129	di->bas.chan = 1;
130	di->bas.regshft = 4;
131
132	di->baudrate = 0;
133	di->databits = 8;
134	di->stopbits = 1;
135	di->parity = UART_PARITY_NONE;
136	return (0);
137}
138#endif
139