cuboot-52xx.c

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/*
 * Old U-boot compatibility for MPC5200
 *
 * Author: Grant Likely <[email protected]>
 *
 * Copyright (c) 2007 Secret Lab Technologies Ltd.
 * 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 "ops.h"
#include "stdio.h"
#include "io.h"
#include "cuboot.h"

#define TARGET_PPC_MPC52xx
#include "ppcboot.h"

static bd_t bd;

static void platform_fixups(void)
{
    void *soc, *reg;
    int div;
    u32 sysfreq;


    dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
    dt_fixup_mac_addresses(bd.bi_enetaddr);
    dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4, bd.bi_busfreq);

    /* Unfortunately, the specific model number is encoded in the
     * soc node name in existing dts files -- once that is fixed,
     * this can do a simple path lookup.
     */
    soc = find_node_by_devtype(NULL, "soc");
    if (!soc)
        soc = find_node_by_compatible(NULL, "fsl,mpc5200-immr");
    if (!soc)
        soc = find_node_by_compatible(NULL, "fsl,mpc5200b-immr");
    if (soc) {
        setprop(soc, "bus-frequency", &bd.bi_ipbfreq,
            sizeof(bd.bi_ipbfreq));

        if (!dt_xlate_reg(soc, 0, (void*)&reg, NULL))
            return;
        div = in_8(reg + 0x204) & 0x0020 ? 8 : 4;
        sysfreq = bd.bi_busfreq * div;
        setprop(soc, "system-frequency", &sysfreq, sizeof(sysfreq));
    }
}

void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
                   unsigned long r6, unsigned long r7)
{
    CUBOOT_INIT();
    fdt_init(_dtb_start);
    serial_console_init();
    platform_ops.fixups = platform_fixups;
}