| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame^] | 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" |
| 27 | #include "io.h" |
| 28 | #include "dcr.h" |
| 29 | #include "4xx.h" |
| 30 | #include "44x.h" |
| 31 | |
| 32 | static u8 *ebony_mac0, *ebony_mac1; |
| 33 | |
| 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 | |
| 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); |
| 77 | ibm4xx_sdram_fixup_memsize(); |
| 78 | dt_fixup_mac_address_by_alias("ethernet0", ebony_mac0); |
| 79 | dt_fixup_mac_address_by_alias("ethernet1", ebony_mac1); |
| 80 | ibm4xx_fixup_ebc_ranges("/plb/opb/ebc"); |
| 81 | ebony_flashsel_fixup(); |
| 82 | } |
| 83 | |
| 84 | void ebony_init(void *mac0, void *mac1) |
| 85 | { |
| 86 | platform_ops.fixups = ebony_fixups; |
| 87 | platform_ops.exit = ibm44x_dbcr_reset; |
| 88 | ebony_mac0 = mac0; |
| 89 | ebony_mac1 = mac1; |
| 90 | fdt_init(_dtb_start); |
| 91 | serial_console_init(); |
| 92 | } |