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62534beb2f
405 SDRAM: - The SDRAM parameters can now be defined in the board
config file and the 405 SDRAM controller values will
be calculated upon bootup (see PPChameleonEVB).
When those settings are not defined in the board
config file, the register setup will be as it is now,
so this implementation should not break any current
design using this code.
Thanks to Andrea Marson from DAVE for this patch.
440 DDR: - Added function sdram_tr1_set to auto calculate the
TR1 value for the DDR.
- Added ECC support (see p3p440).
Patch by Stefan Roese, 17 Mar 2006
78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/*
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* (C) Copyright 2006
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* Stefan Roese, DENX Software Engineering, sr@denx.de.
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*
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* (C) Copyright 2006
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* DAVE Srl <www.dave-tech.it>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef _SDRAM_H_
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#define _SDRAM_H_
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#include <config.h>
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#define mtsdram0(reg, data) mtdcr(memcfga,reg);mtdcr(memcfgd,data)
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#define ONE_BILLION 1000000000
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struct sdram_conf_s {
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unsigned long size;
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int rows;
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unsigned long reg;
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};
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typedef struct sdram_conf_s sdram_conf_t;
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/* Bitfields offsets */
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#define SDRAM0_TR_CASL (31 - 8)
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#define SDRAM0_TR_PTA (31 - 13)
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#define SDRAM0_TR_CTP (31 - 15)
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#define SDRAM0_TR_LDF (31 - 17)
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#define SDRAM0_TR_RFTA (31 - 29)
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#define SDRAM0_TR_RCD (31 - 31)
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#ifdef CFG_SDRAM_CL
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/* SDRAM timings [ns] according to AMCC/IBM names (see SDRAM_faq.doc) */
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#define CFG_SDRAM_CASL CFG_SDRAM_CL
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#define CFG_SDRAM_PTA CFG_SDRAM_tRP
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#define CFG_SDRAM_CTP (CFG_SDRAM_tRC - CFG_SDRAM_tRCD - CFG_SDRAM_tRP)
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#define CFG_SDRAM_LDF 0
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#ifdef CFG_SDRAM_tRFC
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#define CFG_SDRAM_RFTA CFG_SDRAM_tRFC
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#else
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#define CFG_SDRAM_RFTA CFG_SDRAM_tRC
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#endif
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#define CFG_SDRAM_RCD CFG_SDRAM_tRCD
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#endif /* #ifdef CFG_SDRAM_CL */
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/*
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* Some defines for the 440 DDR controller
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*/
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#define SDRAM_CFG0_DC_EN 0x80000000 /* SDRAM Controller Enable */
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#define SDRAM_CFG0_MEMCHK 0x30000000 /* Memory data error checking mask*/
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#define SDRAM_CFG0_MEMCHK_NON 0x00000000 /* No ECC generation */
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#define SDRAM_CFG0_MEMCHK_GEN 0x20000000 /* ECC generation */
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#define SDRAM_CFG0_MEMCHK_CHK 0x30000000 /* ECC generation and checking */
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#define SDRAM_CFG0_DRAMWDTH 0x02000000 /* DRAM width mask */
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#define SDRAM_CFG0_DRAMWDTH_32 0x00000000 /* 32 bits */
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#define SDRAM_CFG0_DRAMWDTH_64 0x02000000 /* 64 bits */
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#endif
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