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f6dfc805 DG |
1 | /* |
2 | * Copyright 2007 David Gibson, IBM Corporation. | |
3 | * | |
4 | * Based on earlier code: | |
5 | * Copyright (C) Paul Mackerras 1997. | |
6 | * | |
7 | * Matt Porter <mporter@kernel.crashing.org> | |
8 | * Copyright 2002-2005 MontaVista Software Inc. | |
9 | * | |
10 | * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> | |
11 | * Copyright (c) 2003, 2004 Zultys Technologies | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or | |
14 | * modify it under the terms of the GNU General Public License | |
15 | * as published by the Free Software Foundation; either version | |
16 | * 2 of the License, or (at your option) any later version. | |
17 | */ | |
18 | #include <stdarg.h> | |
19 | #include <stddef.h> | |
20 | #include "types.h" | |
21 | #include "elf.h" | |
22 | #include "string.h" | |
23 | #include "stdio.h" | |
24 | #include "page.h" | |
25 | #include "ops.h" | |
26 | #include "reg.h" | |
0d279d47 | 27 | #include "io.h" |
f6dfc805 | 28 | #include "dcr.h" |
e90f3b74 | 29 | #include "4xx.h" |
f6dfc805 DG |
30 | #include "44x.h" |
31 | ||
f6dfc805 DG |
32 | static u8 *ebony_mac0, *ebony_mac1; |
33 | ||
0d279d47 DG |
34 | #define EBONY_FPGA_PATH "/plb/opb/ebc/fpga" |
35 | #define EBONY_FPGA_FLASH_SEL 0x01 | |
36 | #define EBONY_SMALL_FLASH_PATH "/plb/opb/ebc/small-flash" | |
37 | ||
38 | static void ebony_flashsel_fixup(void) | |
39 | { | |
40 | void *devp; | |
41 | u32 reg[3] = {0x0, 0x0, 0x80000}; | |
42 | u8 *fpga; | |
43 | u8 fpga_reg0 = 0x0; | |
44 | ||
45 | devp = finddevice(EBONY_FPGA_PATH); | |
46 | if (!devp) | |
47 | fatal("Couldn't locate FPGA node %s\n\r", EBONY_FPGA_PATH); | |
48 | ||
49 | if (getprop(devp, "virtual-reg", &fpga, sizeof(fpga)) != sizeof(fpga)) | |
50 | fatal("%s has missing or invalid virtual-reg property\n\r", | |
51 | EBONY_FPGA_PATH); | |
52 | ||
53 | fpga_reg0 = in_8(fpga); | |
54 | ||
55 | devp = finddevice(EBONY_SMALL_FLASH_PATH); | |
56 | if (!devp) | |
57 | fatal("Couldn't locate small flash node %s\n\r", | |
58 | EBONY_SMALL_FLASH_PATH); | |
59 | ||
60 | if (getprop(devp, "reg", reg, sizeof(reg)) != sizeof(reg)) | |
61 | fatal("%s has reg property of unexpected size\n\r", | |
62 | EBONY_SMALL_FLASH_PATH); | |
63 | ||
64 | /* Invert address bit 14 (IBM-endian) if FLASH_SEL fpga bit is set */ | |
65 | if (fpga_reg0 & EBONY_FPGA_FLASH_SEL) | |
66 | reg[1] ^= 0x80000; | |
67 | ||
68 | setprop(devp, "reg", reg, sizeof(reg)); | |
69 | } | |
70 | ||
f6dfc805 DG |
71 | static void ebony_fixups(void) |
72 | { | |
73 | // FIXME: sysclk should be derived by reading the FPGA registers | |
74 | unsigned long sysclk = 33000000; | |
75 | ||
76 | ibm440gp_fixup_clocks(sysclk, 6 * 1843200); | |
d23f5099 | 77 | ibm4xx_sdram_fixup_memsize(); |
ecc6cd73 DG |
78 | dt_fixup_mac_address_by_alias("ethernet0", ebony_mac0); |
79 | dt_fixup_mac_address_by_alias("ethernet1", ebony_mac1); | |
b2ba34f3 | 80 | ibm4xx_fixup_ebc_ranges("/plb/opb/ebc"); |
0d279d47 | 81 | ebony_flashsel_fixup(); |
f6dfc805 DG |
82 | } |
83 | ||
f6dfc805 DG |
84 | void ebony_init(void *mac0, void *mac1) |
85 | { | |
86 | platform_ops.fixups = ebony_fixups; | |
11123346 | 87 | platform_ops.exit = ibm44x_dbcr_reset; |
f6dfc805 DG |
88 | ebony_mac0 = mac0; |
89 | ebony_mac1 = mac1; | |
2f0dfeaa | 90 | fdt_init(_dtb_start); |
f6dfc805 DG |
91 | serial_console_init(); |
92 | } |