LXR linux/arch/powerpc/boot/cuboot-52xx.c

   1/*
   2 * Old U-boot compatibility for MPC5200
   3 *
   4 * Author: Grant Likely <grant.likely@secretlab.ca>
   5 *
   6 * Copyright (c) 2007 Secret Lab Technologies Ltd.
   7 * Copyright (c) 2007 Freescale Semiconductor, Inc.
   8 *
   9 * This program is free software; you can redistribute it and/or modify it
  10 * under the terms of the GNU General Public License version 2 as published
  11 * by the Free Software Foundation.
  12 */
  13
  14#include "ops.h"
  15#include "stdio.h"
  16#include "io.h"
  17#include "cuboot.h"
  18
  19#define TARGET_PPC_MPC52xx
  20#include "ppcboot.h"
  21
  22static bd_t bd;
  23
  24static void platform_fixups(void)
  25{
  26        void *soc, *reg;
  27        int div;
  28        u32 sysfreq;
  29
  30
  31        dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
  32        dt_fixup_mac_addresses(bd.bi_enetaddr);
  33        dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4, bd.bi_busfreq);
  34
  35        /* Unfortunately, the specific model number is encoded in the
  36         * soc node name in existing dts files -- once that is fixed,
  37         * this can do a simple path lookup.
  38         */
  39        soc = find_node_by_devtype(NULL, "soc");
  40        if (!soc)
  41                soc = find_node_by_compatible(NULL, "fsl,mpc5200-immr");
  42        if (!soc)
  43                soc = find_node_by_compatible(NULL, "fsl,mpc5200b-immr");
  44        if (soc) {
  45                setprop(soc, "bus-frequency", &bd.bi_ipbfreq,
  46                        sizeof(bd.bi_ipbfreq));
  47
  48                if (!dt_xlate_reg(soc, 0, (void*)&reg, NULL))
  49                        return;
  50                div = in_8(reg + 0x204) & 0x0020 ? 8 : 4;
  51                sysfreq = bd.bi_busfreq * div;
  52                setprop(soc, "system-frequency", &sysfreq, sizeof(sysfreq));
  53        }
  54}
  55
  56void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
  57                   unsigned long r6, unsigned long r7)
  58{
  59        CUBOOT_INIT();
  60        fdt_init(_dtb_start);
  61        serial_console_init();
  62        platform_ops.fixups = platform_fixups;
  63}
  64