1 /*
2 * PlanetCore configuration data support functions
3 *
4 * Author: Scott Wood <scottwood@freescale.com>
5 *
6 * Copyright (c) 2007 Freescale Semiconductor, Inc.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published
10 * by the Free Software Foundation.
11 */
12
13 #include "stdio.h"
14 #include "stdlib.h"
15 #include "ops.h"
16 #include "planetcore.h"
17 #include "io.h"
18
19 /* PlanetCore passes information to the OS in the form of
20 * a table of key=value strings, separated by newlines.
21 *
22 * The list is terminated by an empty string (i.e. two
23 * consecutive newlines).
24 *
25 * To make it easier to parse, we first convert all the
26 * newlines into null bytes.
27 */
28
planetcore_prepare_table(char * table)29 void planetcore_prepare_table(char *table)
30 {
31 do {
32 if (*table == '\n')
33 *table = 0;
34
35 table++;
36 } while (*(table - 1) || *table != '\n');
37
38 *table = 0;
39 }
40
planetcore_get_key(const char * table,const char * key)41 const char *planetcore_get_key(const char *table, const char *key)
42 {
43 int keylen = strlen(key);
44
45 do {
46 if (!strncmp(table, key, keylen) && table[keylen] == '=')
47 return table + keylen + 1;
48
49 table += strlen(table) + 1;
50 } while (strlen(table) != 0);
51
52 return NULL;
53 }
54
planetcore_get_decimal(const char * table,const char * key,u64 * val)55 int planetcore_get_decimal(const char *table, const char *key, u64 *val)
56 {
57 const char *str = planetcore_get_key(table, key);
58 if (!str)
59 return 0;
60
61 *val = strtoull(str, NULL, 10);
62 return 1;
63 }
64
planetcore_get_hex(const char * table,const char * key,u64 * val)65 int planetcore_get_hex(const char *table, const char *key, u64 *val)
66 {
67 const char *str = planetcore_get_key(table, key);
68 if (!str)
69 return 0;
70
71 *val = strtoull(str, NULL, 16);
72 return 1;
73 }
74
75 static u64 mac_table[4] = {
76 0x000000000000,
77 0x000000800000,
78 0x000000400000,
79 0x000000c00000,
80 };
81
planetcore_set_mac_addrs(const char * table)82 void planetcore_set_mac_addrs(const char *table)
83 {
84 u8 addr[4][6];
85 u64 int_addr;
86 u32 i;
87 int j;
88
89 if (!planetcore_get_hex(table, PLANETCORE_KEY_MAC_ADDR, &int_addr))
90 return;
91
92 for (i = 0; i < 4; i++) {
93 u64 this_dev_addr = (int_addr & ~0x000000c00000) |
94 mac_table[i];
95
96 for (j = 5; j >= 0; j--) {
97 addr[i][j] = this_dev_addr & 0xff;
98 this_dev_addr >>= 8;
99 }
100
101 dt_fixup_mac_address(i, addr[i]);
102 }
103 }
104
105 static char prop_buf[MAX_PROP_LEN];
106
planetcore_set_stdout_path(const char * table)107 void planetcore_set_stdout_path(const char *table)
108 {
109 char *path;
110 const char *label;
111 void *node, *chosen;
112
113 label = planetcore_get_key(table, PLANETCORE_KEY_SERIAL_PORT);
114 if (!label)
115 return;
116
117 node = find_node_by_prop_value_str(NULL, "linux,planetcore-label",
118 label);
119 if (!node)
120 return;
121
122 path = get_path(node, prop_buf, MAX_PROP_LEN);
123 if (!path)
124 return;
125
126 chosen = finddevice("/chosen");
127 if (!chosen)
128 chosen = create_node(NULL, "chosen");
129 if (!chosen)
130 return;
131
132 setprop_str(chosen, "linux,stdout-path", path);
133 }
134
planetcore_set_serial_speed(const char * table)135 void planetcore_set_serial_speed(const char *table)
136 {
137 void *chosen, *stdout;
138 u64 baud;
139 u32 baud32;
140 int len;
141
142 chosen = finddevice("/chosen");
143 if (!chosen)
144 return;
145
146 len = getprop(chosen, "linux,stdout-path", prop_buf, MAX_PROP_LEN);
147 if (len <= 0)
148 return;
149
150 stdout = finddevice(prop_buf);
151 if (!stdout) {
152 printf("planetcore_set_serial_speed: "
153 "Bad /chosen/linux,stdout-path.\r\n");
154
155 return;
156 }
157
158 if (!planetcore_get_decimal(table, PLANETCORE_KEY_SERIAL_BAUD,
159 &baud)) {
160 printf("planetcore_set_serial_speed: No SB tag.\r\n");
161 return;
162 }
163
164 baud32 = baud;
165 setprop(stdout, "current-speed", &baud32, 4);
166 }
167