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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
5326152f JB |
2 | /* |
3 | * Old U-boot compatibility for Walnut | |
4 | * | |
5 | * Author: Josh Boyer <jwboyer@linux.vnet.ibm.com> | |
6 | * | |
7 | * Copyright 2007 IBM Corporation | |
8 | * Based on cuboot-83xx.c, which is: | |
9 | * Copyright (c) 2007 Freescale Semiconductor, Inc. | |
5326152f JB |
10 | */ |
11 | ||
12 | #include "ops.h" | |
13 | #include "stdio.h" | |
14 | #include "dcr.h" | |
15 | #include "4xx.h" | |
16 | #include "io.h" | |
17 | ||
18 | BSS_STACK(4096); | |
19 | ||
5326152f JB |
20 | static void walnut_flashsel_fixup(void) |
21 | { | |
22 | void *devp, *sram; | |
23 | u32 reg_flash[3] = {0x0, 0x0, 0x80000}; | |
24 | u32 reg_sram[3] = {0x0, 0x0, 0x80000}; | |
25 | u8 *fpga; | |
26 | u8 fpga_brds1 = 0x0; | |
27 | ||
28 | devp = finddevice("/plb/ebc/fpga"); | |
29 | if (!devp) | |
30 | fatal("Couldn't locate FPGA node\n\r"); | |
31 | ||
32 | if (getprop(devp, "virtual-reg", &fpga, sizeof(fpga)) != sizeof(fpga)) | |
33 | fatal("no virtual-reg property\n\r"); | |
34 | ||
35 | fpga_brds1 = in_8(fpga); | |
36 | ||
37 | devp = finddevice("/plb/ebc/flash"); | |
38 | if (!devp) | |
39 | fatal("Couldn't locate flash node\n\r"); | |
40 | ||
41 | if (getprop(devp, "reg", reg_flash, sizeof(reg_flash)) != sizeof(reg_flash)) | |
42 | fatal("flash reg property has unexpected size\n\r"); | |
43 | ||
44 | sram = finddevice("/plb/ebc/sram"); | |
45 | if (!sram) | |
46 | fatal("Couldn't locate sram node\n\r"); | |
47 | ||
48 | if (getprop(sram, "reg", reg_sram, sizeof(reg_sram)) != sizeof(reg_sram)) | |
49 | fatal("sram reg property has unexpected size\n\r"); | |
50 | ||
51 | if (fpga_brds1 & 0x1) { | |
52 | reg_flash[1] ^= 0x80000; | |
53 | reg_sram[1] ^= 0x80000; | |
54 | } | |
55 | ||
56 | setprop(devp, "reg", reg_flash, sizeof(reg_flash)); | |
57 | setprop(sram, "reg", reg_sram, sizeof(reg_sram)); | |
58 | } | |
59 | ||
b3af7a55 | 60 | #define WALNUT_OPENBIOS_MAC_OFF 0xfffffe0b |
5326152f JB |
61 | static void walnut_fixups(void) |
62 | { | |
d23f5099 | 63 | ibm4xx_sdram_fixup_memsize(); |
5326152f JB |
64 | ibm405gp_fixup_clocks(33330000, 0xa8c000); |
65 | ibm4xx_quiesce_eth((u32 *)0xef600800, NULL); | |
66 | ibm4xx_fixup_ebc_ranges("/plb/ebc"); | |
67 | walnut_flashsel_fixup(); | |
ecc6cd73 | 68 | dt_fixup_mac_address_by_alias("ethernet0", (u8 *) WALNUT_OPENBIOS_MAC_OFF); |
5326152f JB |
69 | } |
70 | ||
71 | void platform_init(void) | |
72 | { | |
73 | unsigned long end_of_ram = 0x2000000; | |
74 | unsigned long avail_ram = end_of_ram - (unsigned long) _end; | |
75 | ||
76 | simple_alloc_init(_end, avail_ram, 32, 32); | |
77 | platform_ops.fixups = walnut_fixups; | |
78 | platform_ops.exit = ibm40x_dbcr_reset; | |
2f0dfeaa | 79 | fdt_init(_dtb_start); |
5326152f JB |
80 | serial_console_init(); |
81 | } |