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, "virtual-reg", &fpga, 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(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, "reg", reg, 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, "reg", reg, 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(sysclk, 6 * 1843200); 73 ibm4xx_sdram_fixup_memsize(); 74 dt_fixup_mac_address_by_alias("ethernet0", ebony_mac0); 75 dt_fixup_mac_address_by_alias("ethernet1", ebony_mac1); 76 ibm4xx_fixup_ebc_ranges("/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(_dtb_start); 87 serial_console_init(); 88 } 89