powerpc/boot/cuboot-52xx.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Old U-boot compatibility for MPC5200
0004  *
0005  * Author: Grant Likely <grant.likely@secretlab.ca>
0006  *
0007  * Copyright (c) 2007 Secret Lab Technologies Ltd.
0008  * Copyright (c) 2007 Freescale Semiconductor, Inc.
0009  */
0010
0011 #include "ops.h"
0012 #include "stdio.h"
0013 #include "io.h"
0014 #include "cuboot.h"
0015
0016 #define TARGET_PPC_MPC52xx
0017 #include "ppcboot.h"
0018
0019 static bd_t bd;
0020
0021 static void platform_fixups(void)
0022 {
0023     void *soc, *reg;
0024     int div;
0025     u32 sysfreq;
0026
0027
0028     dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
0029     dt_fixup_mac_addresses(bd.bi_enetaddr);
0030     dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4, bd.bi_busfreq);
0031
0032     /* Unfortunately, the specific model number is encoded in the
0033      * soc node name in existing dts files -- once that is fixed,
0034      * this can do a simple path lookup.
0035      */
0036     soc = find_node_by_devtype(NULL, "soc");
0037     if (!soc)
0038         soc = find_node_by_compatible(NULL, "fsl,mpc5200-immr");
0039     if (!soc)
0040         soc = find_node_by_compatible(NULL, "fsl,mpc5200b-immr");
0041     if (soc) {
0042         setprop(soc, "bus-frequency", &bd.bi_ipbfreq,
0043             sizeof(bd.bi_ipbfreq));
0044
0045         if (!dt_xlate_reg(soc, 0, (void*)&reg, NULL))
0046             return;
0047         div = in_8(reg + 0x204) & 0x0020 ? 8 : 4;
0048         sysfreq = bd.bi_busfreq * div;
0049         setprop(soc, "system-frequency", &sysfreq, sizeof(sysfreq));
0050     }
0051 }
0052
0053 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
0054                    unsigned long r6, unsigned long r7)
0055 {
0056     CUBOOT_INIT();
0057     fdt_init(_dtb_start);
0058     serial_console_init();
0059     platform_ops.fixups = platform_fixups;
0060 }