diff options
Diffstat (limited to 'roms/u-boot-sam460ex/nand_spl/board/amcc/canyonlands/ddr2_fixed.c')
| -rw-r--r-- | roms/u-boot-sam460ex/nand_spl/board/amcc/canyonlands/ddr2_fixed.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/roms/u-boot-sam460ex/nand_spl/board/amcc/canyonlands/ddr2_fixed.c b/roms/u-boot-sam460ex/nand_spl/board/amcc/canyonlands/ddr2_fixed.c new file mode 100644 index 000000000..ed1888ceb --- /dev/null +++ b/roms/u-boot-sam460ex/nand_spl/board/amcc/canyonlands/ddr2_fixed.c @@ -0,0 +1,149 @@ +/* + * (C) Copyright 2008-2009 + * Stefan Roese, DENX Software Engineering, sr@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 <ppc4xx.h> +#include <asm/io.h> +#include <asm/processor.h> + +/* + * This code can configure those two Crucial SODIMM's: + * + * Crucial CT6464AC667.4FE - 512MB SO-DIMM (single rank) + * Crucial CT6464AC667.8FB - 512MB SO-DIMM (dual rank) + * + */ + +#define TEST_ADDR 0x10000000 +#define TEST_MAGIC 0x11223344 + +static void wait_init_complete(void) +{ + u32 val; + + do { + mfsdram(SDRAM_MCSTAT, val); + } while (!(val & 0x80000000)); +} + +static void ddr_start(void) +{ + mtsdram(SDRAM_MCOPT2, 0x28000000); + wait_init_complete(); +} + +static void ddr_init_common(void) +{ + /* + * Reset the DDR-SDRAM controller. + */ + mtsdr(SDR0_SRST, (0x80000000 >> 10)); + mtsdr(SDR0_SRST, 0x00000000); + + /* + * These values are cloned from a running NOR booting + * Canyonlands with SPD-DDR2 detection and calibration + * enabled. This will only work for the same memory + * configuration as used here: + * + */ + mtsdram(SDRAM_MCOPT2, 0x00000000); + mtsdram(SDRAM_MODT0, 0x01000000); + mtsdram(SDRAM_WRDTR, 0x82000823); + mtsdram(SDRAM_CLKTR, 0x40000000); + mtsdram(SDRAM_MB0CF, 0x00000201); + mtsdram(SDRAM_RTR, 0x06180000); + mtsdram(SDRAM_SDTR1, 0x80201000); + mtsdram(SDRAM_SDTR2, 0x42103243); + mtsdram(SDRAM_SDTR3, 0x0A0D0D16); + mtsdram(SDRAM_MMODE, 0x00000632); + mtsdram(SDRAM_MEMODE, 0x00000040); + mtsdram(SDRAM_INITPLR0, 0xB5380000); + mtsdram(SDRAM_INITPLR1, 0x82100400); + mtsdram(SDRAM_INITPLR2, 0x80820000); + mtsdram(SDRAM_INITPLR3, 0x80830000); + mtsdram(SDRAM_INITPLR4, 0x80810040); + mtsdram(SDRAM_INITPLR5, 0x80800532); + mtsdram(SDRAM_INITPLR6, 0x82100400); + mtsdram(SDRAM_INITPLR7, 0x8A080000); + mtsdram(SDRAM_INITPLR8, 0x8A080000); + mtsdram(SDRAM_INITPLR9, 0x8A080000); + mtsdram(SDRAM_INITPLR10, 0x8A080000); + mtsdram(SDRAM_INITPLR11, 0x80000432); + mtsdram(SDRAM_INITPLR12, 0x808103C0); + mtsdram(SDRAM_INITPLR13, 0x80810040); + mtsdram(SDRAM_INITPLR14, 0x00000000); + mtsdram(SDRAM_INITPLR15, 0x00000000); + mtsdram(SDRAM_RDCC, 0x40000000); + mtsdram(SDRAM_RQDC, 0x80000038); + mtsdram(SDRAM_RFDC, 0x00000257); + + mtdcr(SDRAM_R0BAS, 0x0000F800); /* MQ0_B0BAS */ + mtdcr(SDRAM_R1BAS, 0x0400F800); /* MQ0_B1BAS */ +} + +phys_size_t initdram(int board_type) +{ + /* + * First try init for this module: + * + * Crucial CT6464AC667.8FB - 512MB SO-DIMM (dual rank) + */ + + ddr_init_common(); + + /* + * Crucial CT6464AC667.8FB - 512MB SO-DIMM + */ + mtdcr(SDRAM_R0BAS, 0x0000F800); + mtdcr(SDRAM_R1BAS, 0x0400F800); + mtsdram(SDRAM_MCOPT1, 0x05122000); + mtsdram(SDRAM_CODT, 0x02800021); + mtsdram(SDRAM_MB1CF, 0x00000201); + + ddr_start(); + + /* + * Now test if the dual-ranked module is really installed + * by checking an address in the upper 256MByte region + */ + out_be32((void *)TEST_ADDR, TEST_MAGIC); + if (in_be32((void *)TEST_ADDR) != TEST_MAGIC) { + /* + * The test failed, so we assume that the single + * ranked module is installed: + * + * Crucial CT6464AC667.4FE - 512MB SO-DIMM (single rank) + */ + + ddr_init_common(); + + mtdcr(SDRAM_R0BAS, 0x0000F000); + mtsdram(SDRAM_MCOPT1, 0x05322000); + mtsdram(SDRAM_CODT, 0x00800021); + + ddr_start(); + } + + return CONFIG_SYS_MBYTES_SDRAM << 20; +} |