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 22 static bd_t bd; 23 24 static 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*)®, 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 56 void 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