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 
platform_fixups(void)21 static void platform_fixups(void)
22 {
23 	void *soc, *reg;
24 	int div;
25 	u32 sysfreq;
26 
27 
28 	dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
29 	dt_fixup_mac_addresses(bd.bi_enetaddr);
30 	dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4, 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(NULL, "soc");
37 	if (!soc)
38 		soc = find_node_by_compatible(NULL, "fsl,mpc5200-immr");
39 	if (!soc)
40 		soc = find_node_by_compatible(NULL, "fsl,mpc5200b-immr");
41 	if (soc) {
42 		setprop(soc, "bus-frequency", &bd.bi_ipbfreq,
43 			sizeof(bd.bi_ipbfreq));
44 
45 		if (!dt_xlate_reg(soc, 0, (void*)&reg, NULL))
46 			return;
47 		div = in_8(reg + 0x204) & 0x0020 ? 8 : 4;
48 		sysfreq = bd.bi_busfreq * div;
49 		setprop(soc, "system-frequency", &sysfreq, sizeof(sysfreq));
50 	}
51 }
52 
platform_init(unsigned long r3,unsigned long r4,unsigned long r5,unsigned long r6,unsigned long r7)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(_dtb_start);
58 	serial_console_init();
59 	platform_ops.fixups = platform_fixups;
60 }
61