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Diffstat (limited to 'board/amcc/kilauea/init.S')
| -rw-r--r-- | board/amcc/kilauea/init.S | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/board/amcc/kilauea/init.S b/board/amcc/kilauea/init.S new file mode 100644 index 0000000..4338744 --- /dev/null +++ b/board/amcc/kilauea/init.S @@ -0,0 +1,154 @@ +/* + * (C) Copyright 2007 + * Stefan Roese, DENX Software Engineering, sr@denx.de. + * + * Based on code provided from UDTech and AMCC + * + * 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 <config.h> +#include <ppc4xx.h> + +#include <ppc_asm.tmpl> +#include <ppc_defs.h> + +#define mtsdram_as(reg, value) \ + addi r4,0,reg ; \ + mtdcr memcfga,r4 ; \ + addis r4,0,value@h ; \ + ori r4,r4,value@l ; \ + mtdcr memcfgd,r4 ; + + .globl ext_bus_cntlr_init +ext_bus_cntlr_init: +#if !defined(CONFIG_NAND_U_BOOT) || defined(CONFIG_NAND_SPL) + + /* + * DDR2 setup + */ + + /* Following the DDR Core Manual, here is the initialization */ + + /* Step 1 */ + + /* Step 2 */ + + /* Step 3 */ + + /* base=00000000, size=256MByte (6), mode=7 (n*10*8) */ + mtsdram_as(SDRAM_MB0CF, 0x00006701); + + /* SET SDRAM_MB1CF - Not enabled */ + mtsdram_as(SDRAM_MB1CF, 0x00000000); + + /* SET SDRAM_MB2CF - Not enabled */ + mtsdram_as(SDRAM_MB2CF, 0x00000000); + + /* SET SDRAM_MB3CF - Not enabled */ + mtsdram_as(SDRAM_MB3CF, 0x00000000); + + /* SDRAM_CLKTR: Adv Addr clock by 90 deg */ + mtsdram_as(SDRAM_CLKTR, 0x80000000); + + /* Refresh Time register (0x30) Refresh every 7.8125uS */ + mtsdram_as(SDRAM_RTR, 0x06180000); + + /* SDRAM_SDTR1 */ + mtsdram_as(SDRAM_SDTR1, 0x80201000); + + /* SDRAM_SDTR2 */ + mtsdram_as(SDRAM_SDTR2, 0x32204232); + + /* SDRAM_SDTR3 */ + mtsdram_as(SDRAM_SDTR3, 0x080b0d1a); + + mtsdram_as(SDRAM_MMODE, 0x00000442); + mtsdram_as(SDRAM_MEMODE, 0x00000404); + + /* SDRAM0_MCOPT1 (0X20) No ECC Gen */ + mtsdram_as(SDRAM_MCOPT1, 0x04322000); + + /* NOP */ + mtsdram_as(SDRAM_INITPLR0, 0xa8380000); + /* precharge 3 DDR clock cycle */ + mtsdram_as(SDRAM_INITPLR1, 0x81900400); + /* EMR2 twr = 2tck */ + mtsdram_as(SDRAM_INITPLR2, 0x81020000); + /* EMR3 twr = 2tck */ + mtsdram_as(SDRAM_INITPLR3, 0x81030000); + /* EMR DLL ENABLE twr = 2tck */ + mtsdram_as(SDRAM_INITPLR4, 0x81010404); + /* MR w/ DLL reset + * Note: 5 is CL. May need to be changed + */ + mtsdram_as(SDRAM_INITPLR5, 0x81000542); + /* precharge 3 DDR clock cycle */ + mtsdram_as(SDRAM_INITPLR6, 0x81900400); + /* Auto-refresh trfc = 26tck */ + mtsdram_as(SDRAM_INITPLR7, 0x8D080000); + /* Auto-refresh trfc = 26tck */ + mtsdram_as(SDRAM_INITPLR8, 0x8D080000); + /* Auto-refresh */ + mtsdram_as(SDRAM_INITPLR9, 0x8D080000); + /* Auto-refresh */ + mtsdram_as(SDRAM_INITPLR10, 0x8D080000); + /* MRS - normal operation; wait 2 cycle (set wait to tMRD) */ + mtsdram_as(SDRAM_INITPLR11, 0x81000442); + mtsdram_as(SDRAM_INITPLR12, 0x81010780); + mtsdram_as(SDRAM_INITPLR13, 0x81010400); + mtsdram_as(SDRAM_INITPLR14, 0x00000000); + mtsdram_as(SDRAM_INITPLR15, 0x00000000); + + /* SET MCIF0_CODT Die Termination On */ + mtsdram_as(SDRAM_CODT, 0x0080f837); + mtsdram_as(SDRAM_MODT0, 0x01800000); + mtsdram_as(SDRAM_MODT1, 0x00000000); + + mtsdram_as(SDRAM_WRDTR, 0x00000000); + + /* SDRAM0_MCOPT2 (0X21) Start initialization */ + mtsdram_as(SDRAM_MCOPT2, 0x20000000); + + /* Step 5 */ + lis r3,0x1 /* 400000 = wait 100ms */ + mtctr r3 + +pll_wait: + bdnz pll_wait + + /* Step 6 */ + + /* SDRAM_DLCR */ + mtsdram_as(SDRAM_DLCR, 0x030000a5); + + /* SDRAM_RDCC */ + mtsdram_as(SDRAM_RDCC, 0x40000000); + + /* SDRAM_RQDC */ + mtsdram_as(SDRAM_RQDC, 0x80000038); + + /* SDRAM_RFDC */ + mtsdram_as(SDRAM_RFDC, 0x00000209); + + /* Enable memory controller */ + mtsdram_as(SDRAM_MCOPT2, 0x28000000); +#endif /* #ifndef CONFIG_NAND_U_BOOT */ + + blr |