uart_cpu_powerpc.c revision 190681 
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 190681 2009-04-04 00:22:44Z nwhitehorn $");
29
30#include "opt_platform.h"
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <vm/vm.h>
35#include <vm/pmap.h>
36
37#include <machine/bus.h>
38
39#ifndef MPC85XX
40#include <dev/ofw/openfirm.h>
41#include <machine/ofw_machdep.h>
42#endif
43
44#include <dev/uart/uart.h>
45#include <dev/uart/uart_cpu.h>
46
47#ifdef MPC85XX
48bus_space_tag_t uart_bus_space_io = &bs_be_tag;
49bus_space_tag_t uart_bus_space_mem = &bs_be_tag;
50#else
51bus_space_tag_t uart_bus_space_io = &bs_le_tag;
52bus_space_tag_t uart_bus_space_mem = &bs_le_tag;
53#endif
54
55int
56uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
57{
58	return ((pmap_kextract(b1->bsh) == pmap_kextract(b2->bsh)) ? 1 : 0);
59}
60
61#ifdef MPC85XX
62int
63uart_cpu_getdev(int devtype, struct uart_devinfo *di)
64{
65	struct uart_class *class;
66
67	class = &uart_ns8250_class;
68	if (class == NULL)
69		class = &uart_quicc_class;
70	if (class == NULL)
71		return (ENXIO);
72
73	/* Check the environment. */
74	return (uart_getenv(devtype, di, class));
75}
76#else
77int
78uart_cpu_getdev(int devtype, struct uart_devinfo *di)
79{
80	char buf[64];
81	struct uart_class *class;
82	phandle_t input, opts;
83	int error;
84
85	class = &uart_z8530_class;
86	if (class == NULL)
87		return (ENXIO);
88
89	if ((opts = OF_finddevice("/options")) == -1)
90		return (ENXIO);
91	switch (devtype) {
92	case UART_DEV_CONSOLE:
93		if (OF_getprop(opts, "input-device", buf, sizeof(buf)) == -1)
94			return (ENXIO);
95		input = OF_finddevice(buf);
96		if (input == -1)
97			return (ENXIO);
98		if (OF_getprop(opts, "output-device", buf, sizeof(buf)) == -1)
99			return (ENXIO);
100		if (OF_finddevice(buf) != input)
101			return (ENXIO);
102		break;
103	case UART_DEV_DBGPORT:
104		if (!getenv_string("hw.uart.dbgport", buf, sizeof(buf)))
105			return (ENXIO);
106		input = OF_finddevice(buf);
107		if (input == -1)
108			return (ENXIO);
109		break;
110	default:
111		return (EINVAL);
112	}
113
114	if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1)
115		return (ENXIO);
116	if (strcmp(buf, "serial") != 0)
117		return (ENXIO);
118	if (OF_getprop(input, "name", buf, sizeof(buf)) == -1)
119		return (ENXIO);
120
121	if (strcmp(buf, "ch-a") == 0) {
122		class = &uart_z8530_class;
123		di->bas.regshft = 4;
124		di->bas.chan = 1;
125	} else if (strcmp(buf,"serial") == 0) {
126		class = &uart_ns8250_class;
127		di->bas.regshft = 0;
128		di->bas.chan = 0;
129	} else
130		return (ENXIO);
131
132	error = OF_decode_addr(input, 0, &di->bas.bst, &di->bas.bsh);
133	if (error)
134		return (error);
135
136	di->ops = uart_getops(class);
137
138	if (OF_getprop(input, "clock-frequency", &di->bas.rclk,
139	    sizeof(di->bas.rclk)) == -1)
140		di->bas.rclk = 230400;
141	if (OF_getprop(input, "current-speed", &di->baudrate,
142	    sizeof(di->baudrate)) == -1)
143		di->baudrate = 0;
144
145	di->databits = 8;
146	di->stopbits = 1;
147	di->parity = UART_PARITY_NONE;
148	return (0);
149}
150#endif
151