1 /* 2 * Old U-boot compatibility for Walnut 3 * 4 * Author: Josh Boyer <jwboyer@linux.vnet.ibm.com> 5 * 6 * Copyright 2007 IBM Corporation 7 * Based on cuboot-83xx.c, which is: 8 * Copyright (c) 2007 Freescale Semiconductor, Inc. 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License version 2 as published 12 * by the Free Software Foundation. 13 */ 14 15 #include "ops.h" 16 #include "stdio.h" 17 #include "dcr.h" 18 #include "4xx.h" 19 #include "io.h" 20 21 BSS_STACK(4096); 22 walnut_flashsel_fixup(void)23 static void walnut_flashsel_fixup(void) 24 { 25 void *devp, *sram; 26 u32 reg_flash[3] = {0x0, 0x0, 0x80000}; 27 u32 reg_sram[3] = {0x0, 0x0, 0x80000}; 28 u8 *fpga; 29 u8 fpga_brds1 = 0x0; 30 31 devp = finddevice("/plb/ebc/fpga"); 32 if (!devp) 33 fatal("Couldn't locate FPGA node\n\r"); 34 35 if (getprop(devp, "virtual-reg", &fpga, sizeof(fpga)) != sizeof(fpga)) 36 fatal("no virtual-reg property\n\r"); 37 38 fpga_brds1 = in_8(fpga); 39 40 devp = finddevice("/plb/ebc/flash"); 41 if (!devp) 42 fatal("Couldn't locate flash node\n\r"); 43 44 if (getprop(devp, "reg", reg_flash, sizeof(reg_flash)) != sizeof(reg_flash)) 45 fatal("flash reg property has unexpected size\n\r"); 46 47 sram = finddevice("/plb/ebc/sram"); 48 if (!sram) 49 fatal("Couldn't locate sram node\n\r"); 50 51 if (getprop(sram, "reg", reg_sram, sizeof(reg_sram)) != sizeof(reg_sram)) 52 fatal("sram reg property has unexpected size\n\r"); 53 54 if (fpga_brds1 & 0x1) { 55 reg_flash[1] ^= 0x80000; 56 reg_sram[1] ^= 0x80000; 57 } 58 59 setprop(devp, "reg", reg_flash, sizeof(reg_flash)); 60 setprop(sram, "reg", reg_sram, sizeof(reg_sram)); 61 } 62 63 #define WALNUT_OPENBIOS_MAC_OFF 0xfffffe0b walnut_fixups(void)64 static void walnut_fixups(void) 65 { 66 ibm4xx_sdram_fixup_memsize(); 67 ibm405gp_fixup_clocks(33330000, 0xa8c000); 68 ibm4xx_quiesce_eth((u32 *)0xef600800, NULL); 69 ibm4xx_fixup_ebc_ranges("/plb/ebc"); 70 walnut_flashsel_fixup(); 71 dt_fixup_mac_address_by_alias("ethernet0", (u8 *) WALNUT_OPENBIOS_MAC_OFF); 72 } 73 platform_init(void)74 void platform_init(void) 75 { 76 unsigned long end_of_ram = 0x2000000; 77 unsigned long avail_ram = end_of_ram - (unsigned long) _end; 78 79 simple_alloc_init(_end, avail_ram, 32, 32); 80 platform_ops.fixups = walnut_fixups; 81 platform_ops.exit = ibm40x_dbcr_reset; 82 fdt_init(_dtb_start); 83 serial_console_init(); 84 } 85