83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright 2008-2016 Freescale Semiconductor, Inc.
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* Copyright 2017-2018 NXP Semiconductor
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*/
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#ifndef DDR2_DIMM_PARAMS_H
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#define DDR2_DIMM_PARAMS_H
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#define EDC_DATA_PARITY 1
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#define EDC_ECC 2
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#define EDC_AC_PARITY 4
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/* Parameters for a DDR dimm computed from the SPD */
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typedef struct dimm_params_s {
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/* DIMM organization parameters */
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char mpart[19]; /* guaranteed null terminated */
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unsigned int n_ranks;
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unsigned int die_density;
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unsigned long long rank_density;
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unsigned long long capacity;
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unsigned int data_width;
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unsigned int primary_sdram_width;
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unsigned int ec_sdram_width;
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unsigned int registered_dimm;
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unsigned int package_3ds; /* number of dies in 3DS DIMM */
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unsigned int device_width; /* x4, x8, x16 components */
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/* SDRAM device parameters */
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unsigned int n_row_addr;
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unsigned int n_col_addr;
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unsigned int edc_config; /* 0 = none, 1 = parity, 2 = ECC */
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#ifdef CONFIG_SYS_FSL_DDR4
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unsigned int bank_addr_bits;
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unsigned int bank_group_bits;
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#else
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unsigned int n_banks_per_sdram_device;
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#endif
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unsigned int burst_lengths_bitmask; /* BL=4 bit 2, BL=8 = bit 3 */
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/* used in computing base address of DIMMs */
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unsigned long long base_address;
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/* mirrored DIMMs */
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unsigned int mirrored_dimm; /* only for ddr3 */
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/* DIMM timing parameters */
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int mtb_ps; /* medium timebase ps */
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int ftb_10th_ps; /* fine timebase, in 1/10 ps */
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int taa_ps; /* minimum CAS latency time */
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int tfaw_ps; /* four active window delay */
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/*
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* SDRAM clock periods
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* The range for these are 1000-10000 so a short should be sufficient
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*/
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int tckmin_x_ps;
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int tckmin_x_minus_1_ps;
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int tckmin_x_minus_2_ps;
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int tckmax_ps;
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/* SPD-defined CAS latencies */
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unsigned int caslat_x;
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unsigned int caslat_x_minus_1;
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unsigned int caslat_x_minus_2;
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unsigned int caslat_lowest_derated; /* Derated CAS latency */
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/* basic timing parameters */
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int trcd_ps;
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int trp_ps;
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int tras_ps;
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#ifdef CONFIG_SYS_FSL_DDR4
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int trfc1_ps;
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int trfc2_ps;
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int trfc4_ps;
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int trrds_ps;
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int trrdl_ps;
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int tccdl_ps;
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int trfc_slr_ps;
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#else
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int twr_ps; /* maximum = 63750 ps */
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int trfc_ps; /* max = 255 ns + 256 ns + .75 ns
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= 511750 ps */
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int trrd_ps; /* maximum = 63750 ps */
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int twtr_ps; /* maximum = 63750 ps */
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int trtp_ps; /* byte 38, spd->trtp */
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#endif
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int trc_ps; /* maximum = 254 ns + .75 ns = 254750 ps */
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int refresh_rate_ps;
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int extended_op_srt;
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#if defined(CONFIG_SYS_FSL_DDR1) || defined(CONFIG_SYS_FSL_DDR2)
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int tis_ps; /* byte 32, spd->ca_setup */
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int tih_ps; /* byte 33, spd->ca_hold */
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int tds_ps; /* byte 34, spd->data_setup */
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int tdh_ps; /* byte 35, spd->data_hold */
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int tdqsq_max_ps; /* byte 44, spd->tdqsq */
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int tqhs_ps; /* byte 45, spd->tqhs */
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#endif
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/* DDR3 & DDR4 RDIMM */
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unsigned char rcw[16]; /* Register Control Word 0-15 */
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#ifdef CONFIG_SYS_FSL_DDR4
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unsigned int dq_mapping[18];
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unsigned int dq_mapping_ors;
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#endif
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} dimm_params_t;
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unsigned int ddr_compute_dimm_parameters(const unsigned int ctrl_num,
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const generic_spd_eeprom_t *spd,
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dimm_params_t *pdimm,
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unsigned int dimm_number);
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#endif
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