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("$FreeBSD$");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <vm/vm.h>
33#include <vm/pmap.h>
34
35#include <machine/bus.h>
36#include <machine/ofw_machdep.h>
37
38#include <dev/ofw/openfirm.h>
39#include <dev/uart/uart.h>
40#include <dev/uart/uart_cpu.h>
41
42bus_space_tag_t uart_bus_space_io = &bs_le_tag;
43bus_space_tag_t uart_bus_space_mem = &bs_le_tag;
44
45int
46uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
47{
48
49	return ((pmap_kextract(b1->bsh) == pmap_kextract(b2->bsh)) ? 1 : 0);
50}
51
52static int
53ofw_get_uart_console(phandle_t opts, phandle_t *result, const char *inputdev,
54    const char *outputdev)
55{
56	char buf[64];
57	phandle_t input;
58
59	if (OF_getprop(opts, inputdev, buf, sizeof(buf)) == -1)
60		return (ENXIO);
61	input = OF_finddevice(buf);
62	if (input == -1)
63		return (ENXIO);
64	if (OF_getprop(opts, outputdev, buf, sizeof(buf)) == -1)
65		return (ENXIO);
66	if (OF_finddevice(buf) != input)
67		return (ENXIO);
68
69	*result = input;
70	return (0);
71}
72
73int
74uart_cpu_getdev(int devtype, struct uart_devinfo *di)
75{
76	char buf[64];
77	struct uart_class *class;
78	phandle_t input, opts;
79	int error;
80
81	class = &uart_z8530_class;
82	if (class == NULL)
83		return (ENXIO);
84
85	if ((opts = OF_finddevice("/options")) == -1)
86		return (ENXIO);
87	switch (devtype) {
88	case UART_DEV_CONSOLE:
89		if (ofw_get_uart_console(opts, &input, "input-device",
90		    "output-device")) {
91			/*
92			 * At least some G5 Xserves require that we
93			 * probe input-device-1 as well
94			 */
95
96			if (ofw_get_uart_console(opts, &input, "input-device-1",
97			    "output-device-1"))
98				return (ENXIO);
99		}
100		break;
101	case UART_DEV_DBGPORT:
102		if (!getenv_string("hw.uart.dbgport", buf, sizeof(buf)))
103			return (ENXIO);
104		input = OF_finddevice(buf);
105		if (input == -1)
106			return (ENXIO);
107		break;
108	default:
109		return (EINVAL);
110	}
111
112	if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1)
113		return (ENXIO);
114	if (strcmp(buf, "serial") != 0)
115		return (ENXIO);
116	if (OF_getprop(input, "name", buf, sizeof(buf)) == -1)
117		return (ENXIO);
118
119	if (strcmp(buf, "ch-a") == 0) {
120		class = &uart_z8530_class;
121		di->bas.regshft = 4;
122		di->bas.chan = 1;
123	} else if (strcmp(buf,"serial") == 0) {
124		class = &uart_ns8250_class;
125		di->bas.regshft = 0;
126		di->bas.chan = 0;
127	} else
128		return (ENXIO);
129
130	error = OF_decode_addr(input, 0, &di->bas.bst, &di->bas.bsh);
131	if (error)
132		return (error);
133
134	di->ops = uart_getops(class);
135
136	if (OF_getprop(input, "clock-frequency", &di->bas.rclk,
137	    sizeof(di->bas.rclk)) == -1)
138		di->bas.rclk = 230400;
139	if (OF_getprop(input, "current-speed", &di->baudrate,
140	    sizeof(di->baudrate)) == -1)
141		di->baudrate = 0;
142
143	di->databits = 8;
144	di->stopbits = 1;
145	di->parity = UART_PARITY_NONE;
146	return (0);
147}
148