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(start: bd.bi_memstart, size: bd.bi_memsize); |
29 | dt_fixup_mac_addresses(bd.bi_enetaddr); |
30 | dt_fixup_cpu_clocks(cpufreq: bd.bi_intfreq, tbfreq: bd.bi_busfreq / 4, busfreq: 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(prev: NULL, type: "soc" ); |
37 | if (!soc) |
38 | soc = find_node_by_compatible(prev: NULL, compat: "fsl,mpc5200-immr" ); |
39 | if (!soc) |
40 | soc = find_node_by_compatible(prev: NULL, compat: "fsl,mpc5200b-immr" ); |
41 | if (soc) { |
42 | setprop(devp: soc, name: "bus-frequency" , buf: &bd.bi_ipbfreq, |
43 | buflen: sizeof(bd.bi_ipbfreq)); |
44 | |
45 | if (!dt_xlate_reg(node: soc, res: 0, addr: (void*)®, size: NULL)) |
46 | return; |
47 | div = in_8(addr: reg + 0x204) & 0x0020 ? 8 : 4; |
48 | sysfreq = bd.bi_busfreq * div; |
49 | setprop(devp: soc, name: "system-frequency" , buf: &sysfreq, buflen: 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(blob: _dtb_start); |
58 | serial_console_init(); |
59 | platform_ops.fixups = platform_fixups; |
60 | } |
61 | |