diff options
author | Peter Tyser <ptyser@xes-inc.com> | 2010-04-12 22:28:09 -0500 |
---|---|---|
committer | Wolfgang Denk <wd@denx.de> | 2010-04-13 09:13:16 +0200 |
commit | 8d1f268204b07e172f3cb5cee0a3974d605b0b98 (patch) | |
tree | c3359e920cc886e7060fb099bf933496aca37153 /cpu/mpc8xxx/ddr/ddr3_dimm_params.c | |
parent | 819833af39a91fa1c1e8252862bbda6f5a602f7b (diff) | |
download | u-boot-imx-8d1f268204b07e172f3cb5cee0a3974d605b0b98.zip u-boot-imx-8d1f268204b07e172f3cb5cee0a3974d605b0b98.tar.gz u-boot-imx-8d1f268204b07e172f3cb5cee0a3974d605b0b98.tar.bz2 |
ppc: Move cpu/$CPU to arch/ppc/cpu/$CPU
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Diffstat (limited to 'cpu/mpc8xxx/ddr/ddr3_dimm_params.c')
-rw-r--r-- | cpu/mpc8xxx/ddr/ddr3_dimm_params.c | 314 |
1 files changed, 0 insertions, 314 deletions
diff --git a/cpu/mpc8xxx/ddr/ddr3_dimm_params.c b/cpu/mpc8xxx/ddr/ddr3_dimm_params.c deleted file mode 100644 index d4199ba..0000000 --- a/cpu/mpc8xxx/ddr/ddr3_dimm_params.c +++ /dev/null @@ -1,314 +0,0 @@ -/* - * Copyright 2008-2009 Freescale Semiconductor, Inc. - * Dave Liu <daveliu@freescale.com> - * - * calculate the organization and timing parameter - * from ddr3 spd, please refer to the spec - * JEDEC standard No.21-C 4_01_02_11R18.pdf - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * Version 2 as published by the Free Software Foundation. - */ - -#include <common.h> -#include <asm/fsl_ddr_sdram.h> - -#include "ddr.h" - -/* - * Calculate the Density of each Physical Rank. - * Returned size is in bytes. - * - * each rank size = - * sdram capacity(bit) / 8 * primary bus width / sdram width - * - * where: sdram capacity = spd byte4[3:0] - * primary bus width = spd byte8[2:0] - * sdram width = spd byte7[2:0] - * - * SPD byte4 - sdram density and banks - * bit[3:0] size(bit) size(byte) - * 0000 256Mb 32MB - * 0001 512Mb 64MB - * 0010 1Gb 128MB - * 0011 2Gb 256MB - * 0100 4Gb 512MB - * 0101 8Gb 1GB - * 0110 16Gb 2GB - * - * SPD byte8 - module memory bus width - * bit[2:0] primary bus width - * 000 8bits - * 001 16bits - * 010 32bits - * 011 64bits - * - * SPD byte7 - module organiztion - * bit[2:0] sdram device width - * 000 4bits - * 001 8bits - * 010 16bits - * 011 32bits - * - */ -static unsigned long long -compute_ranksize(const ddr3_spd_eeprom_t *spd) -{ - unsigned long long bsize; - - int nbit_sdram_cap_bsize = 0; - int nbit_primary_bus_width = 0; - int nbit_sdram_width = 0; - - if ((spd->density_banks & 0xf) < 7) - nbit_sdram_cap_bsize = (spd->density_banks & 0xf) + 28; - if ((spd->bus_width & 0x7) < 4) - nbit_primary_bus_width = (spd->bus_width & 0x7) + 3; - if ((spd->organization & 0x7) < 4) - nbit_sdram_width = (spd->organization & 0x7) + 2; - - bsize = 1ULL << (nbit_sdram_cap_bsize - 3 - + nbit_primary_bus_width - nbit_sdram_width); - - debug("DDR: DDR III rank density = 0x%16lx\n", bsize); - - return bsize; -} - -/* - * ddr_compute_dimm_parameters for DDR3 SPD - * - * Compute DIMM parameters based upon the SPD information in spd. - * Writes the results to the dimm_params_t structure pointed by pdimm. - * - */ -unsigned int -ddr_compute_dimm_parameters(const ddr3_spd_eeprom_t *spd, - dimm_params_t *pdimm, - unsigned int dimm_number) -{ - unsigned int retval; - unsigned int mtb_ps; - - if (spd->mem_type) { - if (spd->mem_type != SPD_MEMTYPE_DDR3) { - printf("DIMM %u: is not a DDR3 SPD.\n", dimm_number); - return 1; - } - } else { - memset(pdimm, 0, sizeof(dimm_params_t)); - return 1; - } - - retval = ddr3_spd_check(spd); - if (retval) { - printf("DIMM %u: failed checksum\n", dimm_number); - return 2; - } - - /* - * The part name in ASCII in the SPD EEPROM is not null terminated. - * Guarantee null termination here by presetting all bytes to 0 - * and copying the part name in ASCII from the SPD onto it - */ - memset(pdimm->mpart, 0, sizeof(pdimm->mpart)); - memcpy(pdimm->mpart, spd->mpart, sizeof(pdimm->mpart) - 1); - - /* DIMM organization parameters */ - pdimm->n_ranks = ((spd->organization >> 3) & 0x7) + 1; - pdimm->rank_density = compute_ranksize(spd); - pdimm->capacity = pdimm->n_ranks * pdimm->rank_density; - pdimm->primary_sdram_width = 1 << (3 + (spd->bus_width & 0x7)); - if ((spd->bus_width >> 3) & 0x3) - pdimm->ec_sdram_width = 8; - else - pdimm->ec_sdram_width = 0; - pdimm->data_width = pdimm->primary_sdram_width - + pdimm->ec_sdram_width; - - switch (spd->module_type & 0xf) { - case 0x01: /* RDIMM */ - case 0x05: /* Mini-RDIMM */ - pdimm->registered_dimm = 1; /* register buffered */ - break; - - case 0x02: /* UDIMM */ - case 0x03: /* SO-DIMM */ - case 0x04: /* Micro-DIMM */ - case 0x06: /* Mini-UDIMM */ - pdimm->registered_dimm = 0; /* unbuffered */ - break; - - default: - printf("unknown dimm_type 0x%02X\n", spd->module_type); - return 1; - } - - /* SDRAM device parameters */ - pdimm->n_row_addr = ((spd->addressing >> 3) & 0x7) + 12; - pdimm->n_col_addr = (spd->addressing & 0x7) + 9; - pdimm->n_banks_per_sdram_device = 8 << ((spd->density_banks >> 4) & 0x7); - - /* - * The SPD spec has not the ECC bit, - * We consider the DIMM as ECC capability - * when the extension bus exist - */ - if (pdimm->ec_sdram_width) - pdimm->edc_config = 0x02; - else - pdimm->edc_config = 0x00; - - /* - * The SPD spec has not the burst length byte - * but DDR3 spec has nature BL8 and BC4, - * BL8 -bit3, BC4 -bit2 - */ - pdimm->burst_lengths_bitmask = 0x0c; - pdimm->row_density = __ilog2(pdimm->rank_density); - - /* MTB - medium timebase - * The unit in the SPD spec is ns, - * We convert it to ps. - * eg: MTB = 0.125ns (125ps) - */ - mtb_ps = (spd->mtb_dividend * 1000) /spd->mtb_divisor; - pdimm->mtb_ps = mtb_ps; - - /* - * sdram minimum cycle time - * we assume the MTB is 0.125ns - * eg: - * tCK_min=15 MTB (1.875ns) ->DDR3-1066 - * =12 MTB (1.5ns) ->DDR3-1333 - * =10 MTB (1.25ns) ->DDR3-1600 - */ - pdimm->tCKmin_X_ps = spd->tCK_min * mtb_ps; - - /* - * CAS latency supported - * bit4 - CL4 - * bit5 - CL5 - * bit18 - CL18 - */ - pdimm->caslat_X = ((spd->caslat_msb << 8) | spd->caslat_lsb) << 4; - - /* - * min CAS latency time - * eg: tAA_min = - * DDR3-800D 100 MTB (12.5ns) - * DDR3-1066F 105 MTB (13.125ns) - * DDR3-1333H 108 MTB (13.5ns) - * DDR3-1600H 90 MTB (11.25ns) - */ - pdimm->tAA_ps = spd->tAA_min * mtb_ps; - - /* - * min write recovery time - * eg: - * tWR_min = 120 MTB (15ns) -> all speed grades. - */ - pdimm->tWR_ps = spd->tWR_min * mtb_ps; - - /* - * min RAS to CAS delay time - * eg: tRCD_min = - * DDR3-800 100 MTB (12.5ns) - * DDR3-1066F 105 MTB (13.125ns) - * DDR3-1333H 108 MTB (13.5ns) - * DDR3-1600H 90 MTB (11.25) - */ - pdimm->tRCD_ps = spd->tRCD_min * mtb_ps; - - /* - * min row active to row active delay time - * eg: tRRD_min = - * DDR3-800(1KB page) 80 MTB (10ns) - * DDR3-1333(1KB page) 48 MTB (6ns) - */ - pdimm->tRRD_ps = spd->tRRD_min * mtb_ps; - - /* - * min row precharge delay time - * eg: tRP_min = - * DDR3-800D 100 MTB (12.5ns) - * DDR3-1066F 105 MTB (13.125ns) - * DDR3-1333H 108 MTB (13.5ns) - * DDR3-1600H 90 MTB (11.25ns) - */ - pdimm->tRP_ps = spd->tRP_min * mtb_ps; - - /* min active to precharge delay time - * eg: tRAS_min = - * DDR3-800D 300 MTB (37.5ns) - * DDR3-1066F 300 MTB (37.5ns) - * DDR3-1333H 288 MTB (36ns) - * DDR3-1600H 280 MTB (35ns) - */ - pdimm->tRAS_ps = (((spd->tRAS_tRC_ext & 0xf) << 8) | spd->tRAS_min_lsb) - * mtb_ps; - /* - * min active to actice/refresh delay time - * eg: tRC_min = - * DDR3-800D 400 MTB (50ns) - * DDR3-1066F 405 MTB (50.625ns) - * DDR3-1333H 396 MTB (49.5ns) - * DDR3-1600H 370 MTB (46.25ns) - */ - pdimm->tRC_ps = (((spd->tRAS_tRC_ext & 0xf0) << 4) | spd->tRC_min_lsb) - * mtb_ps; - /* - * min refresh recovery delay time - * eg: tRFC_min = - * 512Mb 720 MTB (90ns) - * 1Gb 880 MTB (110ns) - * 2Gb 1280 MTB (160ns) - */ - pdimm->tRFC_ps = ((spd->tRFC_min_msb << 8) | spd->tRFC_min_lsb) - * mtb_ps; - /* - * min internal write to read command delay time - * eg: tWTR_min = 40 MTB (7.5ns) - all speed bins. - * tWRT is at least 4 mclk independent of operating freq. - */ - pdimm->tWTR_ps = spd->tWTR_min * mtb_ps; - - /* - * min internal read to precharge command delay time - * eg: tRTP_min = 40 MTB (7.5ns) - all speed bins. - * tRTP is at least 4 mclk independent of operating freq. - */ - pdimm->tRTP_ps = spd->tRTP_min * mtb_ps; - - /* - * Average periodic refresh interval - * tREFI = 7.8 us at normal temperature range - * = 3.9 us at ext temperature range - */ - pdimm->refresh_rate_ps = 7800000; - - /* - * min four active window delay time - * eg: tFAW_min = - * DDR3-800(1KB page) 320 MTB (40ns) - * DDR3-1066(1KB page) 300 MTB (37.5ns) - * DDR3-1333(1KB page) 240 MTB (30ns) - * DDR3-1600(1KB page) 240 MTB (30ns) - */ - pdimm->tFAW_ps = (((spd->tFAW_msb & 0xf) << 8) | spd->tFAW_min) - * mtb_ps; - - /* - * We need check the address mirror for unbuffered DIMM - * If SPD indicate the address map mirror, The DDR controller - * need care it. - */ - if ((spd->module_type == SPD_MODULETYPE_UDIMM) || - (spd->module_type == SPD_MODULETYPE_SODIMM) || - (spd->module_type == SPD_MODULETYPE_MICRODIMM) || - (spd->module_type == SPD_MODULETYPE_MINIUDIMM)) - pdimm->mirrored_dimm = spd->mod_section.unbuffered.addr_mapping & 0x1; - - return 0; -} |