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https://github.com/brain-hackers/u-boot-brain
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2eb3ac7fe8
Update following DDR related settings for T1040QDS -Correct number of chip selects to two as t1040qds supports two Chip selects. -Update board_specific_parameters udimm structure with settings derived via calibration. -Reduced I2C speed to 50KHz as DDR-SPD does not get reliably read at 400KHz. Verified the updated settings to be working fine with dual-ranked Micron, MT18KSF51272AZ-1G6 DIMM at data rate 833MT/s, 1333MT/s and 1600MT/s. Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com> Signed-off-by: Priyanka Jain <Priyanka.Jain@freescale.com> Reviewed-by: York Sun <yorksun@freescale.com>
53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/*
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* Copyright 2013 Freescale Semiconductor, Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef __DDR_H__
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#define __DDR_H__
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struct board_specific_parameters {
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u32 n_ranks;
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u32 datarate_mhz_high;
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u32 rank_gb;
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u32 clk_adjust;
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u32 wrlvl_start;
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u32 wrlvl_ctl_2;
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u32 wrlvl_ctl_3;
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u32 cpo;
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u32 write_data_delay;
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u32 force_2t;
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};
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/*
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* These tables contain all valid speeds we want to override with board
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* specific parameters. datarate_mhz_high values need to be in ascending order
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* for each n_ranks group.
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*/
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static const struct board_specific_parameters udimm0[] = {
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/*
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* memory controller 0
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* num| hi| rank| clk| wrlvl | wrlvl | wrlvl | cpo |wrdata|2T
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* ranks| mhz| GB |adjst| start | ctl2 | ctl3 | |delay |
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*/
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{2, 833, 4, 4, 6, 0x06060607, 0x08080807, 0xff, 2, 0},
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{2, 833, 0, 4, 6, 0x06060607, 0x08080807, 0xff, 2, 0},
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{2, 1350, 4, 4, 7, 0x0708080A, 0x0A0B0C09, 0xff, 2, 0},
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{2, 1350, 0, 4, 7, 0x0708080A, 0x0A0B0C09, 0xff, 2, 0},
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{2, 1666, 4, 4, 7, 0x0808090B, 0x0C0D0E0A, 0xff, 2, 0},
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{2, 1666, 0, 4, 7, 0x0808090B, 0x0C0D0E0A, 0xff, 2, 0},
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{1, 833, 4, 4, 6, 0x06060607, 0x08080807, 0xff, 2, 0},
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{1, 833, 0, 4, 6, 0x06060607, 0x08080807, 0xff, 2, 0},
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{1, 1350, 4, 4, 7, 0x0708080A, 0x0A0B0C09, 0xff, 2, 0},
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{1, 1350, 0, 4, 7, 0x0708080A, 0x0A0B0C09, 0xff, 2, 0},
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{1, 1666, 4, 4, 7, 0x0808090B, 0x0C0D0E0A, 0xff, 2, 0},
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{1, 1666, 0, 4, 7, 0x0808090B, 0x0C0D0E0A, 0xff, 2, 0},
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{}
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};
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static const struct board_specific_parameters *udimms[] = {
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udimm0,
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};
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#endif
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