| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 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 | } |