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85498ae8 GL |
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"); | |
40847993 GL |
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"); | |
85498ae8 GL |
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(); | |
2f0dfeaa | 60 | fdt_init(_dtb_start); |
85498ae8 GL |
61 | serial_console_init(); |
62 | platform_ops.fixups = platform_fixups; | |
63 | } |