diff options
Diffstat (limited to 'u-boot/board/amcc/sequoia/sdram.c')
| -rw-r--r-- | u-boot/board/amcc/sequoia/sdram.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/u-boot/board/amcc/sequoia/sdram.c b/u-boot/board/amcc/sequoia/sdram.c new file mode 100644 index 0000000..5c01def --- /dev/null +++ b/u-boot/board/amcc/sequoia/sdram.c @@ -0,0 +1,114 @@ +/* + * (C) Copyright 2006 + * Sylvie Gohl, AMCC/IBM, gohl.sylvie@fr.ibm.com + * Jacqueline Pira-Ferriol, AMCC/IBM, jpira-ferriol@fr.ibm.com + * Thierry Roman, AMCC/IBM, thierry_roman@fr.ibm.com + * Alain Saurel, AMCC/IBM, alain.saurel@fr.ibm.com + * Robert Snyder, AMCC/IBM, rob.snyder@fr.ibm.com + * + * (C) Copyright 2006-2007 + * Stefan Roese, DENX Software Engineering, sr@denx.de. + * + * 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 + */ + +/* define DEBUG for debug output */ +#undef DEBUG + +#include <common.h> +#include <asm/processor.h> +#include <asm/io.h> +#include <asm/ppc440.h> + +/*-----------------------------------------------------------------------------+ + * Prototypes + *-----------------------------------------------------------------------------*/ +extern int denali_wait_for_dlllock(void); +extern void denali_core_search_data_eye(void); + +#if defined(CONFIG_NAND_SPL) +/* Using arch/powerpc/cpu/ppc4xx/speed.c to calculate the bus frequency is too big + * for the 4k NAND boot image so define bus_frequency to 133MHz here + * which is save for the refresh counter setup. + */ +#define get_bus_freq(val) 133333333 +#endif + +/************************************************************************* + * + * initdram -- 440EPx's DDR controller is a DENALI Core + * + ************************************************************************/ +phys_size_t initdram (int board_type) +{ +#if !(defined(CONFIG_NAND_U_BOOT) || defined(CONFIG_SYS_RAMBOOT)) || \ + defined(CONFIG_NAND_SPL) + ulong speed = get_bus_freq(0); + + mtsdram(DDR0_02, 0x00000000); + + mtsdram(DDR0_00, 0x0000190A); + mtsdram(DDR0_01, 0x01000000); + mtsdram(DDR0_03, 0x02030602); + mtsdram(DDR0_04, 0x0A020200); + mtsdram(DDR0_05, 0x02020308); + mtsdram(DDR0_06, 0x0102C812); + mtsdram(DDR0_07, 0x000D0100); + mtsdram(DDR0_08, 0x02430001); + mtsdram(DDR0_09, 0x00011D5F); + mtsdram(DDR0_10, 0x00000100); + mtsdram(DDR0_11, 0x0027C800); + mtsdram(DDR0_12, 0x00000003); + mtsdram(DDR0_14, 0x00000000); + mtsdram(DDR0_17, 0x19000000); + mtsdram(DDR0_18, 0x19191919); + mtsdram(DDR0_19, 0x19191919); + mtsdram(DDR0_20, 0x0B0B0B0B); + mtsdram(DDR0_21, 0x0B0B0B0B); + mtsdram(DDR0_22, 0x00267F0B); + mtsdram(DDR0_23, 0x00000000); + mtsdram(DDR0_24, 0x01010002); + if (speed > 133333334) + mtsdram(DDR0_26, 0x5B26050C); + else + mtsdram(DDR0_26, 0x5B260408); + mtsdram(DDR0_27, 0x0000682B); + mtsdram(DDR0_28, 0x00000000); + mtsdram(DDR0_31, 0x00000000); + mtsdram(DDR0_42, 0x01000006); + mtsdram(DDR0_43, 0x030A0200); + mtsdram(DDR0_44, 0x00000003); + mtsdram(DDR0_02, 0x00000001); + + denali_wait_for_dlllock(); +#endif /* #ifndef CONFIG_NAND_U_BOOT */ + +#ifdef CONFIG_DDR_DATA_EYE + /* -----------------------------------------------------------+ + * Perform data eye search if requested. + * ----------------------------------------------------------*/ + denali_core_search_data_eye(); +#endif + + /* + * Clear possible errors resulting from data-eye-search. + * If not done, then we could get an interrupt later on when + * exceptions are enabled. + */ + set_mcsr(get_mcsr()); + + return (CONFIG_SYS_MBYTES_SDRAM << 20); +} |