diff options
Diffstat (limited to 'board/netstal/common/fixed_sdram.c')
| -rw-r--r-- | board/netstal/common/fixed_sdram.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/board/netstal/common/fixed_sdram.c b/board/netstal/common/fixed_sdram.c new file mode 100644 index 0000000..8082f60 --- /dev/null +++ b/board/netstal/common/fixed_sdram.c @@ -0,0 +1,105 @@ +/* + *(C) Copyright 2005-2008 Netstal Maschinen AG + * Niklaus Giger (Niklaus.Giger@netstal.com) + * + * This source code is free software; you can redistribute it + * and/or modify it in source code form 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 <ppc4xx.h> +#include <asm/processor.h> +#include "nm.h" + +#if defined(DEBUG) +void show_sdram_registers(void) +{ + u32 value; + + printf("SDRAM Controller Registers --\n"); + mfsdram(mem_mcopt1, value); + printf(" SDRAM0_CFG : 0x%08x\n", value); + mfsdram(mem_status, value); + printf(" SDRAM0_STATUS: 0x%08x\n", value); + mfsdram(mem_mb0cf, value); + printf(" SDRAM0_B0CR : 0x%08x\n", value); + mfsdram(mem_mb1cf, value); + printf(" SDRAM0_B1CR : 0x%08x\n", value); + mfsdram(mem_sdtr1, value); + printf(" SDRAM0_TR : 0x%08x\n", value); + mfsdram(mem_rtr, value); + printf(" SDRAM0_RTR : 0x%08x\n", value); +} +#endif + +long int fixed_hcu4_sdram (unsigned int dram_size) +{ +#ifdef DEBUG + printf(__FUNCTION__); +#endif + /* disable memory controller */ + mtsdram(mem_mcopt1, 0x00000000); + + udelay (500); + + /* Clear SDRAM0_BESR0 (Bus Error Syndrome Register) */ + mtsdram(mem_besra, 0xffffffff); + + /* Clear SDRAM0_BESR1 (Bus Error Syndrome Register) */ + mtsdram(mem_besrb, 0xffffffff); + + /* Clear SDRAM0_ECCCFG (disable ECC) */ + mtsdram(mem_ecccf, 0x00000000); + + /* Clear SDRAM0_ECCESR (ECC Error Syndrome Register) */ + mtsdram(mem_eccerr, 0xffffffff); + + /* Timing register: CASL=2, PTA=2, CTP=2, LDF=1, RFTA=5, RCD=2 + */ + mtsdram(mem_sdtr1, 0x008a4015); + + /* Memory Bank 0 Config == BA=0x00000000, SZ=64M, AM=3, BE=1 + * and refresh timer + */ + switch (dram_size >> 20) { + case 32: + mtsdram(mem_mb0cf, 0x00062001); + mtsdram(mem_rtr, 0x07F00000); + break; + case 64: + mtsdram(mem_mb0cf, 0x00084001); + mtsdram(mem_rtr, 0x04100000); + break; + case 128: + mtsdram(mem_mb0cf, 0x000A4001); + mtsdram(mem_rtr, 0x04100000); + break; + default: + printf("Invalid memory size of %d MB given\n", dram_size >> 20); + } + + /* Power management idle timer set to the default. */ + mtsdram(mem_pmit, 0x07c00000); + + udelay (500); + + /* Enable banks (DCE=1, BPRF=1, ECCDD=1, EMDUL=1) TODO */ + mtsdram(mem_mcopt1, 0x90800000); + +#ifdef DEBUG + printf("%s: done\n", __FUNCTION__); +#endif + return dram_size; +} |