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
platform_fixups(void)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
platform_init(unsigned long r3,unsigned long r4,unsigned long r5,unsigned long r6,unsigned long r7)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