summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/boot/planetcore.c
blob: 75117e63e6db2e059ee5321a444579b2c3bd0621 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
/*
 * PlanetCore configuration data support functions
 *
 * Author: Scott Wood <scottwood@freescale.com>
 *
 * Copyright (c) 2007 Freescale Semiconductor, Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 */

#include "stdio.h"
#include "stdlib.h"
#include "ops.h"
#include "planetcore.h"
#include "io.h"

/* PlanetCore passes information to the OS in the form of
 * a table of key=value strings, separated by newlines.
 *
 * The list is terminated by an empty string (i.e. two
 * consecutive newlines).
 *
 * To make it easier to parse, we first convert all the
 * newlines into null bytes.
 */

void planetcore_prepare_table(char *table)
{
	do {
		if (*table == '\n')
			*table = 0;

		table++;
	} while (*(table - 1) || *table != '\n');

	*table = 0;
}

const char *planetcore_get_key(const char *table, const char *key)
{
	int keylen = strlen(key);

	do {
		if (!strncmp(table, key, keylen) && table[keylen] == '=')
			return table + keylen + 1;

		table += strlen(table) + 1;
	} while (strlen(table) != 0);

	return NULL;
}

int planetcore_get_decimal(const char *table, const char *key, u64 *val)
{
	const char *str = planetcore_get_key(table, key);
	if (!str)
		return 0;

	*val = strtoull(str, NULL, 10);
	return 1;
}

int planetcore_get_hex(const char *table, const char *key, u64 *val)
{
	const char *str = planetcore_get_key(table, key);
	if (!str)
		return 0;

	*val = strtoull(str, NULL, 16);
	return 1;
}

static u64 mac_table[4] = {
	0x000000000000,
	0x000000800000,
	0x000000400000,
	0x000000c00000,
};

void planetcore_set_mac_addrs(const char *table)
{
	u8 addr[4][6];
	u64 int_addr;
	u32 i;
	int j;

	if (!planetcore_get_hex(table, PLANETCORE_KEY_MAC_ADDR, &int_addr))
		return;

	for (i = 0; i < 4; i++) {
		u64 this_dev_addr = (int_addr & ~0x000000c00000) |
		                    mac_table[i];

		for (j = 5; j >= 0; j--) {
			addr[i][j] = this_dev_addr & 0xff;
			this_dev_addr >>= 8;
		}

		dt_fixup_mac_address(i, addr[i]);
	}
}

static char prop_buf[MAX_PROP_LEN];

void planetcore_set_stdout_path(const char *table)
{
	char *path;
	const char *label;
	void *node, *chosen;

	label = planetcore_get_key(table, PLANETCORE_KEY_SERIAL_PORT);
	if (!label)
		return;

	node = find_node_by_prop_value_str(NULL, "linux,planetcore-label",
	                                   label);
	if (!node)
		return;

	path = get_path(node, prop_buf, MAX_PROP_LEN);
	if (!path)
		return;

	chosen = finddevice("/chosen");
	if (!chosen)
		chosen = create_node(NULL, "chosen");
	if (!chosen)
		return;

	setprop_str(chosen, "linux,stdout-path", path);
}