u-boot/board/freescale/t1040qds/ddr.h
Priyanka Jain 2eb3ac7fe8 powerpc/t1040qds: Update DDR initialization related settings
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>
2014-01-21 13:35:20 -08:00

52 lines
1.6 KiB
C

/*
* Copyright 2013 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __DDR_H__
#define __DDR_H__
struct board_specific_parameters {
u32 n_ranks;
u32 datarate_mhz_high;
u32 rank_gb;
u32 clk_adjust;
u32 wrlvl_start;
u32 wrlvl_ctl_2;
u32 wrlvl_ctl_3;
u32 cpo;
u32 write_data_delay;
u32 force_2t;
};
/*
* These tables contain all valid speeds we want to override with board
* specific parameters. datarate_mhz_high values need to be in ascending order
* for each n_ranks group.
*/
static const struct board_specific_parameters udimm0[] = {
/*
* memory controller 0
* num| hi| rank| clk| wrlvl | wrlvl | wrlvl | cpo |wrdata|2T
* ranks| mhz| GB |adjst| start | ctl2 | ctl3 | |delay |
*/
{2, 833, 4, 4, 6, 0x06060607, 0x08080807, 0xff, 2, 0},
{2, 833, 0, 4, 6, 0x06060607, 0x08080807, 0xff, 2, 0},
{2, 1350, 4, 4, 7, 0x0708080A, 0x0A0B0C09, 0xff, 2, 0},
{2, 1350, 0, 4, 7, 0x0708080A, 0x0A0B0C09, 0xff, 2, 0},
{2, 1666, 4, 4, 7, 0x0808090B, 0x0C0D0E0A, 0xff, 2, 0},
{2, 1666, 0, 4, 7, 0x0808090B, 0x0C0D0E0A, 0xff, 2, 0},
{1, 833, 4, 4, 6, 0x06060607, 0x08080807, 0xff, 2, 0},
{1, 833, 0, 4, 6, 0x06060607, 0x08080807, 0xff, 2, 0},
{1, 1350, 4, 4, 7, 0x0708080A, 0x0A0B0C09, 0xff, 2, 0},
{1, 1350, 0, 4, 7, 0x0708080A, 0x0A0B0C09, 0xff, 2, 0},
{1, 1666, 4, 4, 7, 0x0808090B, 0x0C0D0E0A, 0xff, 2, 0},
{1, 1666, 0, 4, 7, 0x0808090B, 0x0C0D0E0A, 0xff, 2, 0},
{}
};
static const struct board_specific_parameters *udimms[] = {
udimm0,
};
#endif