uart_cpu_powerpc.c revision 190860 
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 190860 2009-04-08 22:19:39Z marcel $");
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#ifdef MPC85XX
59	return ((b1->bsh == b2->bsh) ? 1 : 0);
60#else
61	return ((pmap_kextract(b1->bsh) == pmap_kextract(b2->bsh)) ? 1 : 0);
62#endif
63}
64
65#ifdef MPC85XX
66int
67uart_cpu_getdev(int devtype, struct uart_devinfo *di)
68{
69	struct uart_class *class;
70
71	class = &uart_ns8250_class;
72	if (class == NULL)
73		class = &uart_quicc_class;
74	if (class == NULL)
75		return (ENXIO);
76
77	/* Check the environment. */
78	return (uart_getenv(devtype, di, class));
79}
80#else
81int
82uart_cpu_getdev(int devtype, struct uart_devinfo *di)
83{
84	char buf[64];
85	struct uart_class *class;
86	phandle_t input, opts;
87	int error;
88
89	class = &uart_z8530_class;
90	if (class == NULL)
91		return (ENXIO);
92
93	if ((opts = OF_finddevice("/options")) == -1)
94		return (ENXIO);
95	switch (devtype) {
96	case UART_DEV_CONSOLE:
97		if (OF_getprop(opts, "input-device", buf, sizeof(buf)) == -1)
98			return (ENXIO);
99		input = OF_finddevice(buf);
100		if (input == -1)
101			return (ENXIO);
102		if (OF_getprop(opts, "output-device", buf, sizeof(buf)) == -1)
103			return (ENXIO);
104		if (OF_finddevice(buf) != input)
105			return (ENXIO);
106		break;
107	case UART_DEV_DBGPORT:
108		if (!getenv_string("hw.uart.dbgport", buf, sizeof(buf)))
109			return (ENXIO);
110		input = OF_finddevice(buf);
111		if (input == -1)
112			return (ENXIO);
113		break;
114	default:
115		return (EINVAL);
116	}
117
118	if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1)
119		return (ENXIO);
120	if (strcmp(buf, "serial") != 0)
121		return (ENXIO);
122	if (OF_getprop(input, "name", buf, sizeof(buf)) == -1)
123		return (ENXIO);
124
125	if (strcmp(buf, "ch-a") == 0) {
126		class = &uart_z8530_class;
127		di->bas.regshft = 4;
128		di->bas.chan = 1;
129	} else if (strcmp(buf,"serial") == 0) {
130		class = &uart_ns8250_class;
131		di->bas.regshft = 0;
132		di->bas.chan = 0;
133	} else
134		return (ENXIO);
135
136	error = OF_decode_addr(input, 0, &di->bas.bst, &di->bas.bsh);
137	if (error)
138		return (error);
139
140	di->ops = uart_getops(class);
141
142	if (OF_getprop(input, "clock-frequency", &di->bas.rclk,
143	    sizeof(di->bas.rclk)) == -1)
144		di->bas.rclk = 230400;
145	if (OF_getprop(input, "current-speed", &di->baudrate,
146	    sizeof(di->baudrate)) == -1)
147		di->baudrate = 0;
148
149	di->databits = 8;
150	di->stopbits = 1;
151	di->parity = UART_PARITY_NONE;
152	return (0);
153}
154#endif
155