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 } 93