/* * (C) Copyright 2003 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include <common.h> #include <command.h> #include <asm/addrspace.h> #include <asm/inca-ip.h> extern uint incaip_get_cpuclk(void); static ulong max_sdram_size(void) { /* The only supported SDRAM data width is 16bit. */ #define CFG_DW 2 /* The only supported number of SDRAM banks is 4. */ #define CFG_NB 4 ulong cfgpb0 = *INCA_IP_SDRAM_MC_CFGPB0; int cols = cfgpb0 & 0xF; int rows = (cfgpb0 & 0xF0) >> 4; ulong size = (1 << (rows + cols)) * CFG_DW * CFG_NB; return size; } long int initdram(int board_type) { int rows, cols, best_val = *INCA_IP_SDRAM_MC_CFGPB0; ulong size, max_size = 0; ulong our_address; asm volatile ("move %0, $25" : "=r" (our_address) :); /* Can't probe for RAM size unless we are running from Flash. */ if (PHYSADDR(our_address) < PHYSADDR(PHYS_FLASH_1)) { return max_sdram_size(); } for (cols = 0x8; cols <= 0xC; cols++) { for (rows = 0xB; rows <= 0xD; rows++) { *INCA_IP_SDRAM_MC_CFGPB0 = (0x14 << 8) | (rows << 4) | cols; size = get_ram_size((long *)CFG_SDRAM_BASE, max_sdram_size()); if (size > max_size) { best_val = *INCA_IP_SDRAM_MC_CFGPB0; max_size = size; } } } *INCA_IP_SDRAM_MC_CFGPB0 = best_val; return max_size; } int checkboard (void) { unsigned long chipid = *INCA_IP_WDT_CHIPID; int part_num; puts ("Board: INCA-IP "); part_num = (chipid >> 12) & 0xffff; switch (part_num) { case 0xc0: printf ("Standard Version, "); break; case 0xc1: printf ("Basic Version, "); break; default: printf ("Unknown Part Number 0x%x ", part_num); break; } printf ("Chip V1.%ld, ", (chipid >> 28)); printf("CPU Speed %d MHz\n", incaip_get_cpuclk()/1000000); return 0; }