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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Old U-boot compatibility for MPC5200
   4  *
   5  * Author: Grant Likely <grant.likely@secretlab.ca>
   6  *
   7  * Copyright (c) 2007 Secret Lab Technologies Ltd.
   8  * Copyright (c) 2007 Freescale Semiconductor, Inc.
   9  */
  10
  11 #include "ops.h"
  12 #include "stdio.h"
  13 #include "io.h"
  14 #include "cuboot.h"
  15
  16 #define TARGET_PPC_MPC52xx
  17 #include "ppcboot.h"
  18
  19 static bd_t bd;
  20
  21 static void platform_fixups(void)
  22 {
  23         void *soc, *reg;
  24         int div;
  25         u32 sysfreq;
  26
  27
  28         dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
  29         dt_fixup_mac_addresses(bd.bi_enetaddr);
  30         dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4, bd.bi_busfreq);
  31
  32         /* Unfortunately, the specific model number is encoded in the
  33          * soc node name in existing dts files -- once that is fixed,
  34          * this can do a simple path lookup.
  35          */
  36         soc = find_node_by_devtype(NULL, "soc");
  37         if (!soc)
  38                 soc = find_node_by_compatible(NULL, "fsl,mpc5200-immr");
  39         if (!soc)
  40                 soc = find_node_by_compatible(NULL, "fsl,mpc5200b-immr");
  41         if (soc) {
  42                 setprop(soc, "bus-frequency", &bd.bi_ipbfreq,
  43                         sizeof(bd.bi_ipbfreq));
  44
  45                 if (!dt_xlate_reg(soc, 0, (void*)&reg, NULL))
  46                         return;
  47                 div = in_8(reg + 0x204) & 0x0020 ? 8 : 4;
  48                 sysfreq = bd.bi_busfreq * div;
  49                 setprop(soc, "system-frequency", &sysfreq, sizeof(sysfreq));
  50         }
  51 }
  52
  53 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
  54                    unsigned long r6, unsigned long r7)
  55 {
  56         CUBOOT_INIT();
  57         fdt_init(_dtb_start);
  58         serial_console_init();
  59         platform_ops.fixups = platform_fixups;
  60 }