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Commit fec60470 authored by Scott Wood's avatar Scott Wood Committed by Paul Mackerras
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[POWERPC] bootwrapper: Add PlanetCore firmware support



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: default avatarScott Wood <scottwood@freescale.com>
Acked-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 27ff35d9
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@@ -45,7 +45,7 @@ src-wlib := string.S crt0.S stdio.c main.c flatdevtree.c flatdevtree_misc.c \
		ns16550.c serial.c simple_alloc.c div64.S util.S \
		gunzip_util.c elf_util.c $(zlib) devtree.c oflib.c ofconsole.c \
		4xx.c ebony.c mv64x60.c mpsc.c mv64x60_i2c.c cuboot.c bamboo.c \
		cpm-serial.c stdlib.c mpc52xx-psc.c
		cpm-serial.c stdlib.c mpc52xx-psc.c planetcore.c
src-plat := of.c cuboot-52xx.c cuboot-83xx.c cuboot-85xx.c holly.c \
		cuboot-ebony.c treeboot-ebony.c prpmc2800.c \
		ps3-head.S ps3-hvcall.S ps3.c treeboot-bamboo.c cuboot-8xx.c \
+166 −0
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/*
 * 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);
}

void planetcore_set_serial_speed(const char *table)
{
	void *chosen, *stdout;
	u64 baud;
	u32 baud32;
	int len;

	chosen = finddevice("/chosen");
	if (!chosen)
		return;

	len = getprop(chosen, "linux,stdout-path", prop_buf, MAX_PROP_LEN);
	if (len <= 0)
		return;

	stdout = finddevice(prop_buf);
	if (!stdout) {
		printf("planetcore_set_serial_speed: "
		       "Bad /chosen/linux,stdout-path.\r\n");

		return;
	}

	if (!planetcore_get_decimal(table, PLANETCORE_KEY_SERIAL_BAUD,
	                            &baud)) {
		printf("planetcore_set_serial_speed: No SB tag.\r\n");
		return;
	}

	baud32 = baud;
	setprop(stdout, "current-speed", &baud32, 4);
}
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#ifndef _PPC_BOOT_PLANETCORE_H_
#define _PPC_BOOT_PLANETCORE_H_

#include "types.h"

#define PLANETCORE_KEY_BOARD_TYPE   "BO"
#define PLANETCORE_KEY_BOARD_REV    "BR"
#define PLANETCORE_KEY_MB_RAM       "D1"
#define PLANETCORE_KEY_MAC_ADDR     "EA"
#define PLANETCORE_KEY_FLASH_SPEED  "FS"
#define PLANETCORE_KEY_IP_ADDR      "IP"
#define PLANETCORE_KEY_KB_NVRAM     "NV"
#define PLANETCORE_KEY_PROCESSOR    "PR"
#define PLANETCORE_KEY_PROC_VARIANT "PV"
#define PLANETCORE_KEY_SERIAL_BAUD  "SB"
#define PLANETCORE_KEY_SERIAL_PORT  "SP"
#define PLANETCORE_KEY_SWITCH       "SW"
#define PLANETCORE_KEY_TEMP_OFFSET  "TC"
#define PLANETCORE_KEY_TARGET_IP    "TIP"
#define PLANETCORE_KEY_CRYSTAL_HZ   "XT"

/* Prepare the table for processing, by turning all newlines
 * into NULL bytes.
 */
void planetcore_prepare_table(char *table);

/* Return the value associated with a given key in text,
 * decimal, or hex format.
 *
 * Returns zero/NULL on failure, non-zero on success.
 */
const char *planetcore_get_key(const char *table, const char *key);
int planetcore_get_decimal(const char *table, const char *key, u64 *val);
int planetcore_get_hex(const char *table, const char *key, u64 *val);

/* Updates the device tree local-mac-address properties based
 * on the EA tag.
 */
void planetcore_set_mac_addrs(const char *table);

/* Sets the linux,stdout-path in the /chosen node.  This requires the
 * linux,planetcore-label property in each serial node.
 */
void planetcore_set_stdout_path(const char *table);

/* Sets the current-speed property in the serial node. */
void planetcore_set_serial_speed(const char *table);

#endif