fec6047047
This is a library that board code can use to extract information from the PlanetCore configuration keys. PlanetCore is used on various boards from Embedded Planet. Signed-off-by: Scott Wood <scottwood@freescale.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
166 lines
3.3 KiB
C
166 lines
3.3 KiB
C
/*
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* PlanetCore configuration data support functions
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*
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* Author: Scott Wood <scottwood@freescale.com>
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*
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* Copyright (c) 2007 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*/
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#include "stdio.h"
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#include "stdlib.h"
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#include "ops.h"
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#include "planetcore.h"
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#include "io.h"
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/* PlanetCore passes information to the OS in the form of
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* a table of key=value strings, separated by newlines.
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*
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* The list is terminated by an empty string (i.e. two
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* consecutive newlines).
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*
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* To make it easier to parse, we first convert all the
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* newlines into null bytes.
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*/
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void planetcore_prepare_table(char *table)
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{
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do {
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if (*table == '\n')
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*table = 0;
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table++;
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} while (*(table - 1) || *table != '\n');
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*table = 0;
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}
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const char *planetcore_get_key(const char *table, const char *key)
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{
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int keylen = strlen(key);
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do {
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if (!strncmp(table, key, keylen) && table[keylen] == '=')
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return table + keylen + 1;
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table += strlen(table) + 1;
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} while (strlen(table) != 0);
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return NULL;
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}
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int planetcore_get_decimal(const char *table, const char *key, u64 *val)
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{
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const char *str = planetcore_get_key(table, key);
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if (!str)
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return 0;
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*val = strtoull(str, NULL, 10);
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return 1;
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}
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int planetcore_get_hex(const char *table, const char *key, u64 *val)
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{
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const char *str = planetcore_get_key(table, key);
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if (!str)
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return 0;
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*val = strtoull(str, NULL, 16);
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return 1;
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}
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static u64 mac_table[4] = {
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0x000000000000,
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0x000000800000,
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0x000000400000,
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0x000000c00000,
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};
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void planetcore_set_mac_addrs(const char *table)
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{
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u8 addr[4][6];
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u64 int_addr;
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u32 i;
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int j;
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if (!planetcore_get_hex(table, PLANETCORE_KEY_MAC_ADDR, &int_addr))
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return;
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for (i = 0; i < 4; i++) {
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u64 this_dev_addr = (int_addr & ~0x000000c00000) |
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mac_table[i];
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for (j = 5; j >= 0; j--) {
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addr[i][j] = this_dev_addr & 0xff;
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this_dev_addr >>= 8;
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}
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dt_fixup_mac_address(i, addr[i]);
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}
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}
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static char prop_buf[MAX_PROP_LEN];
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void planetcore_set_stdout_path(const char *table)
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{
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char *path;
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const char *label;
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void *node, *chosen;
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label = planetcore_get_key(table, PLANETCORE_KEY_SERIAL_PORT);
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if (!label)
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return;
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node = find_node_by_prop_value_str(NULL, "linux,planetcore-label",
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label);
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if (!node)
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return;
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path = get_path(node, prop_buf, MAX_PROP_LEN);
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if (!path)
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return;
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chosen = finddevice("/chosen");
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if (!chosen)
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chosen = create_node(NULL, "chosen");
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if (!chosen)
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return;
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setprop_str(chosen, "linux,stdout-path", path);
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}
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void planetcore_set_serial_speed(const char *table)
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{
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void *chosen, *stdout;
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u64 baud;
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u32 baud32;
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int len;
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chosen = finddevice("/chosen");
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if (!chosen)
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return;
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len = getprop(chosen, "linux,stdout-path", prop_buf, MAX_PROP_LEN);
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if (len <= 0)
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return;
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stdout = finddevice(prop_buf);
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if (!stdout) {
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printf("planetcore_set_serial_speed: "
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"Bad /chosen/linux,stdout-path.\r\n");
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return;
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}
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if (!planetcore_get_decimal(table, PLANETCORE_KEY_SERIAL_BAUD,
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&baud)) {
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printf("planetcore_set_serial_speed: No SB tag.\r\n");
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return;
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}
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baud32 = baud;
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setprop(stdout, "current-speed", &baud32, 4);
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}
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