1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Copyright 2007 David Gibson, IBM Corporation. |
4 | * |
5 | * Based on earlier code: |
6 | * Copyright (C) Paul Mackerras 1997. |
7 | * |
8 | * Matt Porter <mporter@kernel.crashing.org> |
9 | * Copyright 2002-2005 MontaVista Software Inc. |
10 | * |
11 | * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> |
12 | * Copyright (c) 2003, 2004 Zultys Technologies |
13 | */ |
14 | #include <stdarg.h> |
15 | #include <stddef.h> |
16 | #include "types.h" |
17 | #include "elf.h" |
18 | #include "string.h" |
19 | #include "stdio.h" |
20 | #include "page.h" |
21 | #include "ops.h" |
22 | #include "reg.h" |
23 | #include "io.h" |
24 | #include "dcr.h" |
25 | #include "4xx.h" |
26 | #include "44x.h" |
27 | |
28 | static u8 *ebony_mac0, *ebony_mac1; |
29 | |
30 | #define EBONY_FPGA_PATH "/plb/opb/ebc/fpga" |
31 | #define EBONY_FPGA_FLASH_SEL 0x01 |
32 | #define EBONY_SMALL_FLASH_PATH "/plb/opb/ebc/small-flash" |
33 | |
34 | static void ebony_flashsel_fixup(void) |
35 | { |
36 | void *devp; |
37 | u32 reg[3] = {0x0, 0x0, 0x80000}; |
38 | u8 *fpga; |
39 | u8 fpga_reg0 = 0x0; |
40 | |
41 | devp = finddevice(EBONY_FPGA_PATH); |
42 | if (!devp) |
43 | fatal("Couldn't locate FPGA node %s\n\r" , EBONY_FPGA_PATH); |
44 | |
45 | if (getprop(devp, name: "virtual-reg" , buf: &fpga, buflen: sizeof(fpga)) != sizeof(fpga)) |
46 | fatal("%s has missing or invalid virtual-reg property\n\r" , |
47 | EBONY_FPGA_PATH); |
48 | |
49 | fpga_reg0 = in_8(addr: fpga); |
50 | |
51 | devp = finddevice(EBONY_SMALL_FLASH_PATH); |
52 | if (!devp) |
53 | fatal("Couldn't locate small flash node %s\n\r" , |
54 | EBONY_SMALL_FLASH_PATH); |
55 | |
56 | if (getprop(devp, name: "reg" , buf: reg, buflen: sizeof(reg)) != sizeof(reg)) |
57 | fatal("%s has reg property of unexpected size\n\r" , |
58 | EBONY_SMALL_FLASH_PATH); |
59 | |
60 | /* Invert address bit 14 (IBM-endian) if FLASH_SEL fpga bit is set */ |
61 | if (fpga_reg0 & EBONY_FPGA_FLASH_SEL) |
62 | reg[1] ^= 0x80000; |
63 | |
64 | setprop(devp, name: "reg" , buf: reg, buflen: sizeof(reg)); |
65 | } |
66 | |
67 | static void ebony_fixups(void) |
68 | { |
69 | // FIXME: sysclk should be derived by reading the FPGA registers |
70 | unsigned long sysclk = 33000000; |
71 | |
72 | ibm440gp_fixup_clocks(sys_clk: sysclk, ser_clk: 6 * 1843200); |
73 | ibm4xx_sdram_fixup_memsize(); |
74 | dt_fixup_mac_address_by_alias(alias: "ethernet0" , addr: ebony_mac0); |
75 | dt_fixup_mac_address_by_alias(alias: "ethernet1" , addr: ebony_mac1); |
76 | ibm4xx_fixup_ebc_ranges(ebc: "/plb/opb/ebc" ); |
77 | ebony_flashsel_fixup(); |
78 | } |
79 | |
80 | void ebony_init(void *mac0, void *mac1) |
81 | { |
82 | platform_ops.fixups = ebony_fixups; |
83 | platform_ops.exit = ibm44x_dbcr_reset; |
84 | ebony_mac0 = mac0; |
85 | ebony_mac1 = mac1; |
86 | fdt_init(blob: _dtb_start); |
87 | serial_console_init(); |
88 | } |
89 | |